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Umbilical vesicle Stock Photos and Images
RFEW9HHP–Progress of the allantoic decreased umbilical vesicle, vintage engraved illustration. Usual Medicine Dictionary - Paul Labarthe
RMRJY6GB–. An atlas of human anatomy for students and physicians. Anatomy. Amnion Amnion Stomodaeum, or buccal invagination Pedicle of the yolk-sac, or splanchnic staiJi -Hypoblast Entoderm Mesoblast Mesoderm Fig. 796.âHuman Embryo in the Beginning of the Third Week (Diagrammatic). Fore-gut Visceral cleft Kudiment of the lung ^ Notochord Chorda dorsalis ^v. Dorsal rudiment of the pancreas Ventral rudiment of the - pancreas Wolffian body, mid-kidney, or mesonephrosâCorpus Woirfi Rudiment of the gall-bladder Mid-gut Primitive mesentery Allantois. Umbilical vesicle Vesicula umbilicalis Hypoblast Entoderm
RMPG3YXR–. A text-book of agricultural zoology. Zoology, Economic. DEVELOPMENT OF MAMMALIA. 429 attached to the parent by means of a membrane called the placenta, which more or less closely unites the foetus to the walls of the uterus in which it develops (fig. 205). The placenta is formed by the allantois, the walls of the uterus, and the false amnion. The embryo mammal becomes folded off in a sac, the embryonic sac, just as does the chick, from the yolk-sac, called in the Mammalia the umbilical vesicle {UV). The amnion grows up on each side and unites above the embryo. The inner fold or true amnion t
![Infographic of the fetal development and placenta up to the 60th day of gestation. [QuarkXPress (.qxp); 6259x4015]. Stock Photo](https://c8.alamy.com/comp/2NEBWBX/infographic-of-the-fetal-development-and-placenta-up-to-the-60th-day-of-gestation-quarkxpress-qxp-6259x4015-2NEBWBX.jpg "Infographic of the fetal development and placenta up to the 60th day of gestation. [QuarkXPress (.qxp); 6259x4015]. Stock Photo")
RM2NEBWBX–Infographic of the fetal development and placenta up to the 60th day of gestation. [QuarkXPress (.qxp); 6259x4015].
RMRWXF56–Elements of comparative anatomy (1878) Elements of comparative anatomy elementsofcompar00gege Year: 1878 55G COMPARATIVE ANATOMY. connection between the foetus and the uterus. A rudiment of the yolk-sac is retained as the ' umbilical vesicle/' which is not taken into the body-cavity, as it is not of any use in the nutrition of the embryo, but is after birth separated from the young animal with the coverings of the egg. The divisions of the alimentary canal are the same as those in the Invertebrata; fore-, mid-, and hind-gut. F ore-gut. § 418. A The first portion of the alimentary canal proper
RFEW91WW–Progress of the allantoic decreased umbilical vesicle, vintage engraved illustration. Usual Medicine Dictionary - Paul Labarthe
RM2AKX402–Cyclopædia of obstetrics and gynecology . mostplainly in those non-viable deformities in which there is abdominal, vesi-cal, and pelvic fissure. The umbilical vesicle is drawn strongly down-wards, and thus the closure of the lower part of the abdominal wall isprevented. This tension is transmitted to the intestines, which are thusdrawn down between the two lateral rudiments of the internal genitals.This, however, does not explain the existence of the abnormality wherethere is no vesical fissure and consequent intestinal tension. Here thosedeformities which are dependent upon an over-distension
RMPG3YX6–. A text-book of agricultural zoology. Zoology, Economic. 432 MAMMALIA. known as the decidua serotina (6), and that part of the uterine wall not related directly to the vesicle, the decidua vera (c). The chorion is directly attached to the decidua reflexa and serotina. The vascular connection between the reflexa and the chorion atrophies, whilst that between the serotina and the uv-. FlG. 205.—DiAGBAMMATIC SectIOIT OF PREGNANT HUMAN UTERUS WITH CONTAINED FCETUS. (Z, Allantoic stalk; uv, umbilical vesicle; am, aiunion; eft, chorion; b, decidua sero- tina ; c, decidua vera; /, decidua reflexa; F
RFEW91WP–Origin of allantoic, vintage engraved illustration. Usual Medicine Dictionary - Paul Labarthe - 1885.
RM2AKFHRJ–A System of midwifery : including the diseases of pregnancy and the puerperal state . ccompanying representation of the product of an abortion aboutthe twenty-fifth to the twenty-eighth day, shows the embryo and itsmembranes partly dissected, and magnified about seven times and ahair. The Chorion, which has been opened in its whole extent, isrecognized by its villi externally, and the numerous bloodvessels on itsinternal surface. Above, and to the left, is seen the umbilical vesicle,with the branches of the oinphalo-mesenteric vessels coursing upon it.It lies, as has already been shown, betwee
![. The elements of embryology . Embryology. X.] THE HUMAN EMBRYO. Fia. 110. 337 air/i fi^--. zem Three Eaelt Human Embryos. (Copied from His.) A. Side view of an early embryo described by His. B. Embryo of about 12—14 days described by AUen Thom- son. C. Young embryo described by His. am. amnion; md. medullary groove; wn. umbilical vesicle; ch. chorion, to which the embryo is attached by a stalk. and yolk-sac filled up but a very small part of the whole cavity of the vesicle. The embryo, which was probably not quite normal (Fig. 110 A), was very imperfectly developed; a me- dullary plate was ha Stock Photo](https://c8.alamy.com/comp/PG3TBD/the-elements-of-embryology-embryology-x-the-human-embryo-fia-110-337-airi-fi-zem-three-eaelt-human-embryos-copied-from-his-a-side-view-of-an-early-embryo-described-by-his-b-embryo-of-about-1214-days-described-by-auen-thom-son-c-young-embryo-described-by-his-am-amnion-md-medullary-groove-wn-umbilical-vesicle-ch-chorion-to-which-the-embryo-is-attached-by-a-stalk-and-yolk-sac-filled-up-but-a-very-small-part-of-the-whole-cavity-of-the-vesicle-the-embryo-which-was-probably-not-quite-normal-fig-110-a-was-very-imperfectly-developed-a-me-dullary-plate-was-ha-PG3TBD.jpg ". The elements of embryology . Embryology. X.] THE HUMAN EMBRYO. Fia. 110. 337 air/i fi^--. zem Three Eaelt Human Embryos. (Copied from His.) A. Side view of an early embryo described by His. B. Embryo of about 12—14 days described by AUen Thom- son. C. Young embryo described by His. am. amnion; md. medullary groove; wn. umbilical vesicle; ch. chorion, to which the embryo is attached by a stalk. and yolk-sac filled up but a very small part of the whole cavity of the vesicle. The embryo, which was probably not quite normal (Fig. 110 A), was very imperfectly developed; a me- dullary plate was ha Stock Photo")
RMPG3TBD–. The elements of embryology . Embryology. X.] THE HUMAN EMBRYO. Fia. 110. 337 air/i fi^--. zem Three Eaelt Human Embryos. (Copied from His.) A. Side view of an early embryo described by His. B. Embryo of about 12—14 days described by AUen Thom- son. C. Young embryo described by His. am. amnion; md. medullary groove; wn. umbilical vesicle; ch. chorion, to which the embryo is attached by a stalk. and yolk-sac filled up but a very small part of the whole cavity of the vesicle. The embryo, which was probably not quite normal (Fig. 110 A), was very imperfectly developed; a me- dullary plate was ha
RFEW9HHN–Origin of allantoic, vintage engraved illustration. Usual Medicine Dictionary - Paul Labarthe - 1885.
RM2ANGK7X–Quain's elements of anatomy . r with the comparative small size of the maxillary and mandibular parts ofthe face, the form of the external auricle, and the form and attitude of the limbs. Fig. 670. Fig. 670.—Diagrammatic section op the EAELY HUMAN OVUM ACCORDING TO HiS. (From Balfour after His).Am, amnion : Nb, umbilical vesicle. It would have been desirable to givesome account at this place of the rate ofprogress and the peculiarities of formand structure belonging to the successivestages of early growth and developmentin the haman embryo ; but the want ofspace and the paucity of materials fo
RMPG3TAR–. The elements of embryology . Embryology. XI.J THE CHORION. Fio. 117. 357. M-^-- Diagrammatic Section op Pregnant Human Uterus with CONTAINED F(ETUS. (From Huxley after Longet.) al. allantoic stalk; ni. umbilical vesicle; am. amnion; ch. cho- rion ; ds. decidua serotina; du. decidua vera; dr. decidua reflexa; I. fallopian tube ; c. cervix uteri; u. uterus; z. foetal villi of true placenta; ^. villi of non-plaoental part of chorion. The placenta has a somewhat discoidal form, with a slightly convex uterine surface and a concave embryonic surface. At its edge it is continuous both with the deci
RFEW91WX–Human Egg 30 to 55 days, vintage engraved illustration. Usual Medicine Dictionary - Paul Labarthe - 1885.
RM2AX2W6T–A theoretical and practical treatise on midwifery : including the diseases of pregnancy and parturition and the attentions required by the child from birth to the period of weaning . s, the one embryonic, the other forming the umbilical vesicle. A line of greater obscurity may soon be recognized at the centre of this spot,being the first trace of the embryo. The margins of this spot fold inwards, as doalso the extremities, thereby giving rise to an elongated body, with the endsswollen, in consequence of their doubling up, and a cavity of some depth at itscentre. The body of the embryo is then
RMPG194T–. Veterinary obstetrics; a compendium for the use of students and practitioners. Veterinary obstetrics. PHYSIOLOGY. 35 abdomen of the foetus at the umbilical opening, and then passes backwards to join the anterior extremity of the bladder, with the cavity of which the space between the two layers of the allantois is in communication. It is believed that the allantoid sac or cavity acts the. Fig. i6. FcETAL Membranes of the Cow at Mid-term. A Uterus opened on its left side; B, B, Cotyledons of the Uterus; C, C, ' Placentulse; D, D, Allantois; E, Vesicle of the Urachus; F, Amnion; G, Umbilical C
RFEW9HHW–Human Egg 30 to 55 days, vintage engraved illustration. Usual Medicine Dictionary - Paul Labarthe - 1885.
RM2AKNAE9–A treatise on the science and practice of midwifery . ter of Development of the Amnion1. Vitelline membrane. 2. External layblastodermic membrane. 3. Internal layersforming the umbilical vesicle. 4. Umbilicalvessels. 5. Projections forming amnions.6. Embryo. 7. Allantois. CONCEPTION AND GENERATION 107 tion of the yelk, and forms the ephemeral structure known as the umbili-cal vesicle, from which the foetus derives most of its nourishment duringthe early stage of its existence. Its communication with the abdominalcavity of the foetus is through the constricted portion at the point of Fig. 56..
![. A manual of zoology. Zoology. " ki. Fig. 3. Fig. 4. Fig. 3.—Human embryo, 4.2 mm. long (after His). Pericardium and lateral body wall opened, yolk-sac and allantois cut away, course of blood-vessels shown; a, arterial trunk; al, allantois stalk; c, precava, uniting with yolk and umbilical veins; d, intestine; do, yolk stalk; h, ear vesicle; K, ventricle of heart; 0, upper jaw; r, olfactory groove; 5, tail; u, lower jaw; us, somites; V, atrium of heart; 1-5, the five arterial arches. Fig. 4.—Tadpoles of Rana teniporaria. m, mouth; g, upper jaw; s, lower jaw; s, sucking-disc; kb, external Stock Photo](https://c8.alamy.com/comp/PG3R7B/a-manual-of-zoology-zoology-quot-ki-fig-3-fig-4-fig-3human-embryo-42-mm-long-after-his-pericardium-and-lateral-body-wall-opened-yolk-sac-and-allantois-cut-away-course-of-blood-vessels-shown-a-arterial-trunk-al-allantois-stalk-c-precava-uniting-with-yolk-and-umbilical-veins-d-intestine-do-yolk-stalk-h-ear-vesicle-k-ventricle-of-heart-0-upper-jaw-r-olfactory-groove-5-tail-u-lower-jaw-us-somites-v-atrium-of-heart-1-5-the-five-arterial-arches-fig-4tadpoles-of-rana-teniporaria-m-mouth-g-upper-jaw-s-lower-jaw-s-sucking-disc-kb-external-PG3R7B.jpg ". A manual of zoology. Zoology. " ki. Fig. 3. Fig. 4. Fig. 3.—Human embryo, 4.2 mm. long (after His). Pericardium and lateral body wall opened, yolk-sac and allantois cut away, course of blood-vessels shown; a, arterial trunk; al, allantois stalk; c, precava, uniting with yolk and umbilical veins; d, intestine; do, yolk stalk; h, ear vesicle; K, ventricle of heart; 0, upper jaw; r, olfactory groove; 5, tail; u, lower jaw; us, somites; V, atrium of heart; 1-5, the five arterial arches. Fig. 4.—Tadpoles of Rana teniporaria. m, mouth; g, upper jaw; s, lower jaw; s, sucking-disc; kb, external Stock Photo")
RMPG3R7B–. A manual of zoology. Zoology. " ki. Fig. 3. Fig. 4. Fig. 3.—Human embryo, 4.2 mm. long (after His). Pericardium and lateral body wall opened, yolk-sac and allantois cut away, course of blood-vessels shown; a, arterial trunk; al, allantois stalk; c, precava, uniting with yolk and umbilical veins; d, intestine; do, yolk stalk; h, ear vesicle; K, ventricle of heart; 0, upper jaw; r, olfactory groove; 5, tail; u, lower jaw; us, somites; V, atrium of heart; 1-5, the five arterial arches. Fig. 4.—Tadpoles of Rana teniporaria. m, mouth; g, upper jaw; s, lower jaw; s, sucking-disc; kb, external
RM2AKYW67–Human physiology (Volume 2) . dmitted to be a physiological condition. Osiander andDollinger class it amongst imaginary organs; and Velpeau remarks,that out of about two hundred vesicles, which he had examined,in foetuses under three months of development, he had met withonly thirty in which the umbilical vesicle was in a state, thatcould be called natural. Under such circumstances.it is not easyto understand how he could distinguish the physiological fromthe pathological condition. If the existence of the vesicle be apart of the physiological or natural process, the majority of vesi-cles ough
RM2AJBEHD–An atlas of human anatomy for students and physicians . Fig. 796.—Human Embryo in the Beginning of the Third Week (Diagrammatic). Fore-gutVisceral cleftRudiment of the lung / Notochord Cliorda dorsalis^^ Dorsal rudiment of thepancreasVentral rudiment of the —pancreasWolffian body, mid-kidney, ormesonephros—Corpus WolffiRudiment of the gall-bladder. Mid-gut^ Primitive mesentery Allantois Umbilical vesicle Vesicula umbilicalisHypoblastEntoderm-MesoblastMesoderm - Umbilical or vitelline duct Ductus omphalo-entericus > -- -Chorion M- - - Pleuroperitoneal cavityVi^ (coelom) (S ^ —Rudiment of
RM2AWKA05–A system of obstetrics . ut withthe dwindling of the umbilical vesicle and the growth of the placentathey become larger; the right one (ti) soon atrophies, but the left (uf)remains as the great umbilical vein until birth. The umbilical vesicle (Figs. 55 and 56) being an outgrowth ofthe splanchnopleure, as is also the heart essentially, its veins run, ofcourse, in the mesoblastic layer of the splanchnopleure to the heart.The portions of the splanchnopleure next the embryo form (p. 186)most of the alimentary canal, and veins from this region of it appear 180 DEVELOPMENT OF THE EMBRYO. as the ali
RM2AJKFMN–A manual of practical obstetrics . k, with themerest remnant of a vesicle on its distal extremity, and whichmay still be discovered by careful dissection underneath thesheath of amnion that covers the umbilical cord, later in preg-nancy, as will be seen hereafter. When the nutrient contents of the umbilical vesicle haveall been used up, it is evident some other source of nutritionfor the embryo must be supplied. This we shall now find tobe provided by the development of the amnion, allantois, cho-rion, and placenta, which indeed has already begun and con-siderably advanced before the contents
RM2AKNA2N–A treatise on the science and practice of midwifery . placentalend of the umbilical cord at the full period of preg-nancy. The umbilical vesicle is filled with a yel-lowish fluid, containing many oil- and fat-globules,similar to the yelk of an egg. The Allantois.—Somewhere about the twentiethday after conception a small vesicle is formed towardthe caudal extremity of the foetus, which is calledthe allantyis. This membrane in mammals is im-portant, as it forms the greater part of the fetalplacenta, a small portion of it remaining inside thebody permanently as the bladder. It begins as adivertic
RM2AJGF0M–A treatise on the science and practice of midwifery . at the full period of preg-nancy. The umbilical vesicle is filled with ayellowish fluid, containing many oil and fatglobules, similar to the yelk of an egg. The Allantois.—Somewhere about the twen-tieth day after conception a small vesicle isformed towards the caudal extremity of thefoetus, which is called the allantois. It is welldeveloped and persistent in many of the loweranimals, but in man it is merely a temporarystructure, and disappears after it has fulfilled itsfunctions. Its study, therefore, in the humanrace has been a matter of d
RM2AX2RNH–A theoretical and practical treatise on midwifery : including the diseases of pregnancy and parturition and the attentions required by the child from birth to the period of weaning . ch is represented atthis early period by an elongated gutter, com- This figure shows the amnios almost municating freely with the interior cavity of completed, and likewise the origin of the, -i i i , -, -r, , ,. ,, . allantois. o. The umbilical vesicle. I. The the blastoderm. But, in proportion as this intestines. E. The amnios. E. The ex Constantly increasing inversion of the lateral ternal layer of the blastod
RM2ANG32H–Quain's elements of anatomy . the embryo;uv, umbilical vesicle; al, allantoic! pedicle ;ae, anterior extremity ; pe, posterior extremity ;the Wolffian ridge passing between them. The lappet or bud which first showsitself appears to correspond most nearlywith the distal segment comprising thehand or foot, the other two segmentsbeing successively developed betweenit and the root or girdle at an earlyperiod. The new part shows itself first by the notched separation of a segment between the terminal one andthe side of the body, corresponding to the forearm or lower leg, andthis is followed by the
RM2AX2PYA–A theoretical and practical treatise on midwifery : including the diseases of pregnancy and parturition and the attentions required by the child from birth to the period of weaning . -I—-- 186 GENERATION.. that enter, and an artery that emerges from the embryo, are called the omphalo-mesenteric vessels. (Fig. 44.) As the contraction of the ventral opening in the embryo, and the circumscrip-tion of the umbilical vesicle goes on, we may observe at the inferior part of theintestinal canal, just in the region where the bladder and rectum, during theearlier days of embryonic life, are confounded un
RM2AJKDEX–A manual of practical obstetrics . a, a. Projecting folds of amnion.z. Zona pellucida,or vitelline mem-brane, s. Epiblast, or ext. blasto-dermic membrane, m. Hypoblast,or int. blastodermic membrane, v.Umbilical vesicle. The letters have the same refer-ence as in Fig. 20, only the partsshown are further developed. The first structure to begin its development is the amnion.It commences as follows: A sort of hollow pouch, fold, orduplication of the epiblast projects near the caudal end of the Fig. 22. p-
RM2AWJHDE–A system of obstetrics . t, which, atfirst solid, but later containing a canal, grows outward and backward,owing to the presence of the large umbilical vesicle anteriorly, until itcomes in contact with the periphery of the ovum. AVithin this sausage-shaped (aXAac, a sausage) projection are blood-vessels, which are carriedwith its growth to the periphery of the ovum, Avhere they enter the villiof the chorion in the manner already described. Becoming reduced totwo arteries and a vein within the allantois itself, they constitute thevessels of the umbilical cord, which are destined to carry the bl
![A system of obstetrics . e stalkof the allantois. A oro—ection of the cord in this stage isdiagram-matically represented in Fig. 58. As development progresses the umbilical cord becomes relativelylonger and narrower (Fig. ). The Bomatopleures, folding in moreand more until they meet at the nave] and close-in the ccelome, carrythe somatopleuric stalk with them until it ultimately comes into con-tad with the stalks of the umbilical vesicle and yelk-sac, and all fusetogether to make one solid cord traversed by the allantoic blood-vessels, THE EARLY STAGES OF DEVELOPMENT. 131 of which the arteries Stock Photo](https://c8.alamy.com/comp/2AWMBNN/a-system-of-obstetrics-e-stalkof-the-allantois-a-oroection-of-the-cord-in-this-stage-isdiagram-matically-represented-in-fig-58-as-development-progresses-the-umbilical-cord-becomes-relativelylonger-and-narrower-fig-the-bomatopleures-folding-in-moreand-more-until-they-meet-at-the-nave-and-close-in-the-ccelome-carrythe-somatopleuric-stalk-with-them-until-it-ultimately-comes-into-con-tad-with-the-stalks-of-the-umbilical-vesicle-and-yelk-sac-and-all-fusetogether-to-make-one-solid-cord-traversed-by-the-allantoic-blood-vessels-the-early-stages-of-development-131-of-which-the-arteries-2AWMBNN.jpg "A system of obstetrics . e stalkof the allantois. A oro—ection of the cord in this stage isdiagram-matically represented in Fig. 58. As development progresses the umbilical cord becomes relativelylonger and narrower (Fig. ). The Bomatopleures, folding in moreand more until they meet at the nave] and close-in the ccelome, carrythe somatopleuric stalk with them until it ultimately comes into con-tad with the stalks of the umbilical vesicle and yelk-sac, and all fusetogether to make one solid cord traversed by the allantoic blood-vessels, THE EARLY STAGES OF DEVELOPMENT. 131 of which the arteries Stock Photo")
RM2AWMBNN–A system of obstetrics . e stalkof the allantois. A oro—ection of the cord in this stage isdiagram-matically represented in Fig. 58. As development progresses the umbilical cord becomes relativelylonger and narrower (Fig. ). The Bomatopleures, folding in moreand more until they meet at the nave] and close-in the ccelome, carrythe somatopleuric stalk with them until it ultimately comes into con-tad with the stalks of the umbilical vesicle and yelk-sac, and all fusetogether to make one solid cord traversed by the allantoic blood-vessels, THE EARLY STAGES OF DEVELOPMENT. 131 of which the arteries
RM2AKHB1K–A reference handbook of the medical sciences, embracing the entire range of scientific and practical medicine and allied science . Fig. 667.—Early Em-bryo of Mus Sylvaticus.En, Endoderm; c, cavityof umbilical vesicle; ol,trophoblast; Tr, prolif-erating trophoblast: Ec, is afterward cut off toform the amniotic cav-ity. (From Minot, afterSelenka.) REFERENCE HANDBOOK OF THE MEDICAL SCIENCES Blastoderm. inverse correlation between the size of the youngblastocyst and the activity of the trophoblast. Inthe Primates and the rodents, with a very active tro-phoblast, the young blastocyst is very minute
RM2AM3RTC–Obstetrics : the science and the art . has completely established itsbranchio-absorptive connection with the parent—-just as happens tothe urachus and allantois. Omphalo-Mesenteric Vessels and Cord.—In perfect ova,aborted at the period of two months, or a little later, the Studentwill readily distinguish the umbilical vesicle shining through the chorion and lying betwixt itand the delicate amnioticmembrane. I add here afigure (61), that may serveto explain its arrangement.Let a be a portion of the ab-domen of the embryo, andc c the navel or umbilicalring; b b the navel string orcord laid open;
RM2AJKFXC–A manual of practical obstetrics . the longitudinal axis ofthis last, a streak or furrow appears—the so-called primitivetrace—wThich is the beginning of the spinal cord. (See Fig. 18.) THE UMBILICAL VESICLE. 75 Let us next suppose an incision to be made transverselyacross and completely through the little globular-shaped ovum,at right angles to the line of the primitive trace. The cutsurface thus brought to view will exhibit, at a rather laterstage of evolution, a section of the dorsal plate*, and the ab-dominal plates. The dorsal plates {luminal dorsales) are simplythe lateral edges of the pr
RM2ANGRW3–Quain's elements of anatomy . uni Fig. 666.—Three eaelt human embrtoes (from Balfour after His). A. An embryo of less than fourteen clays, desciibed by His. am, amnion ; uw,, lun-bilical vesicle ; di, chorion to which the embryo is attached by a stalk. B. Embryo of about fourteen days, described by AU^u Thomson. %un, umbilicalvesicle ; rtid, medullary groove. C. Embryo of sixteen or eighteen days, described by His. wm, umbilical vesicle. first mentioned specimens, the amnion, although imperfectly observednevertheless already existed, but had been accidentally destroyed, and Hisis of opinion th
RM2AJCFF0–A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . artery and the aorta forms tlie duc-tus arteriosus, a veiy important fietal structure, as it en-ables the venous blood from the right side of the heart topass into the aorta without going through the lungs. Thegrowth of the liver has also been an important factor inbringing about modifications in the venous system. Withthe diminution of the umbilical vesicle the extra embry-onic portion of the omphalo-meseuterics disappears, butthe embryonic portions of the two vein
RM2AKY5KX–A text-book of veterinary obstetrics : including the diseases and accidents incidental to pregnancy, parturition and early age in the domesticated animals . pted to the uterus ; the amnion, a second ovoidsac included within the latter, and containing the fcetus ; the allantoic,a n^embrane composed of two layers, wliich are spread over the externalface of the amnion and the inner surface of the chorion, and thus linesthe cavity formed by these two envelopes; a small bladder of a pyri-form shape, the umbilical vesicle ; the jylaccnta, a collection of vasculartufts grafting the fcetus to the moth
RM2AKN9PK–A treatise on the science and practice of midwifery . An Embryo of abouttwenty-live days laid open. i After Coste.)a. Chorion. /•. Amnion.<•. Cavity of chorion.<l. Umbilical vesicle.<?. Pedicle of allantois./. Embryo. coin- grows until il 108 PREGNANCY. comes into contact with the most external ovular membrane, the chorion,over the entire inner surface of which it spreads. In this part vesselssoon develop—namely, the two umbilical arteries, derived from theabdominal aorta, and two umbilical veins, one of which subsequentlydisappears; these, along with the vitelline duct and the pedicl
RM2AN2WD0–Carpenter's principles of human physiology . beneath the spinal column ofthe embryo, whilst the re-mainder, whieh is at that timethe largest part of it, forms thevitelline or umbilical vesicle.From the folding in of thesplanchnopleure its hypoblasticportion comes to line the tube,and from it is formed theepithelium of the intestine, whilst the mesoblastic portion, tne omphalo-meBaraic vein; l stomach; m, intestine, com . r 7 mumcating with the umbilical vesicle n, n; o, o, corpora lying OUtSlde, gives rise to the Wolffiana; p, allantois; q, q, anterior extremities ; r, r, pos- SubmuCGUS layers
RM2AFTE97–. Obstetrics: the science and the art. as in the Figure 57 annexed. The blastoderm is developed upon asegment of this sphere, as in Fig. 58. When the blastoderm doubles PREGNANCY. 217 or folds its edges inwards, it pinches a portion of the vitellary ball,as in Fig. 59. In a still further progress, Fig. 60, the portion of thevitellary ball that remains outside of the embryon is connected tothe embryo by a delicate tube or vitellary duct. This tube or ductopens into the intestinum ileum of the embryo. Yelpeau &ajs thatthe yelk matter contained in the umbilical vesicle can be pressedalong the tub
RM2AJGF3X–A treatise on the science and practice of midwifery . Development of the Amnion.Vitelline membrane. 2. External layerof blastodermic membrane. •*. Internallayers forming the umbilical vesicle. 4.Umbilical vessels. .0. Projections Conn-ing amnion. 6. Allantoic 96 PREGNANCY. communication with the abdominal cavity of the foetus is throughthe constricted portion at the point of division called the vitellineduct (Fig. 52). An artery and vein, the omphalo-mesenteric, ramifyon the vesicle and its duct. Fig. 52.. I. Exo-chorion. 2. External layer ofblastodermic membrane.5. Amnion. 6. Embryon. 7. Alla
RM2AM3T8J–Obstetrics : the science and the art . •J1U PII E G N A N C Y When the blastoderm doubles or folds its edges inwards, it pinchesa portion of the vitellary ball, as in Fig. 59. In a still further progress, Fig. 60, the portion of the vitellary ballthat remains outside of the embryon is connected to the embryo bya delicate tube or vitellary duct. This tube or duct opens into theintestinum ileum of the embryo. Yelpeau says that the yelk mattercontained in the umbilical vesicle can be pressed along the tube andthrough it squeezed into the gut. It is supposed to furnish a pabulumto the early embryo
RM2AWK4YT–A system of obstetrics . Fig. 127.—(From Allen Thomson.) Sketch of Human Embryo of the Tenth Week, showing the coilof intestine in the umbilical cord. The amnion and chorion have been opened and the embryopulled aside from them, v, umbilical vesicle, connected with the intestine, i, by a narrowcord. The smaller figure shows the proximal portion of the umbilical cord more magni-fied: i, intestine; vi, vitello-lntestinal duet. Fig. 128.—(From Balfour, after GStte.) Diagram of Part of the Digestive Tract of a Chick Embryoof the Fourth Day. The black line indicates hypoblast: the shaded portion, m
![A system of obstetrics . lo-mesenteric arterv; . the the head; behind them may be seen vein : L. liver, with arriving and departingveins : D, intestine ; i, inferior cava : T. coc-cyx : (iU. allantois, with z, one umbilicalartery, and x, an umbilical vein. b, the omphalo-mesenteric arteries on umbilical vesicle: r. omphalo-mesenteric t]ie ear^ an(| m front arises the ex-ternal nose. The limbs are sepa-rated into their three divisions, andthe first suggestions of hands andith the fingers and toes webbed. The Wolffianbodies are much lessened in size, but the kidneys and suprarenalcapsules are no Stock Photo](https://c8.alamy.com/comp/2AWJT47/a-system-of-obstetrics-lo-mesenteric-arterv-the-the-head-behind-them-may-be-seen-vein-l-liver-with-arriving-and-departingveins-d-intestine-i-inferior-cava-t-coc-cyx-iu-allantois-with-z-one-umbilicalartery-and-x-an-umbilical-vein-b-the-omphalo-mesenteric-arteries-on-umbilical-vesicle-r-omphalo-mesenteric-t-ie-ear-an-m-front-arises-the-ex-ternal-nose-the-limbs-are-sepa-rated-into-their-three-divisions-andthe-first-suggestions-of-hands-andith-the-fingers-and-toes-webbed-the-wolffianbodies-are-much-lessened-in-size-but-the-kidneys-and-suprarenalcapsules-are-no-2AWJT47.jpg "A system of obstetrics . lo-mesenteric arterv; . the the head; behind them may be seen vein : L. liver, with arriving and departingveins : D, intestine ; i, inferior cava : T. coc-cyx : (iU. allantois, with z, one umbilicalartery, and x, an umbilical vein. b, the omphalo-mesenteric arteries on umbilical vesicle: r. omphalo-mesenteric t]ie ear^ an(| m front arises the ex-ternal nose. The limbs are sepa-rated into their three divisions, andthe first suggestions of hands andith the fingers and toes webbed. The Wolffianbodies are much lessened in size, but the kidneys and suprarenalcapsules are no Stock Photo")
RM2AWJT47–A system of obstetrics . lo-mesenteric arterv; . the the head; behind them may be seen vein : L. liver, with arriving and departingveins : D, intestine ; i, inferior cava : T. coc-cyx : (iU. allantois, with z, one umbilicalartery, and x, an umbilical vein. b, the omphalo-mesenteric arteries on umbilical vesicle: r. omphalo-mesenteric t]ie ear^ an(| m front arises the ex-ternal nose. The limbs are sepa-rated into their three divisions, andthe first suggestions of hands andith the fingers and toes webbed. The Wolffianbodies are much lessened in size, but the kidneys and suprarenalcapsules are no
RM2AJGEED–A treatise on the science and practice of midwifery . An Embryo of about twen-ty-five days laid open.(After Coste.)a. Chorion, b. Amnion.e. Cavity of chorion, d.Umbilical vesicle, e. Pedi-cle of allantois. /. Em-bryo. CONCEPTION AND GENERATION, 97 the umbilical vesicle, it becomes divided into two parts, communi-cating with each other, the smaller of them being eventually de-veloped into the urinary bladder. The larger portion, leaving theabdominal cavity along with the vitelline duct, rapidly grows untilit comes into contact with the most external ovular membrane, thechorion, over the entire
RM2AJA4FH–An atlas of human anatomy for students and physicians . Yolk sac (umbilical vesicle)Amnion Fallopian tube Tuba uterina (Falloppii) Neck of the uterus or cervix uteri Uterine cavityCa um uteri Embryo Os uteri internumOrificuim internum uteri Cavity of the cervix, or cervical canal ( analis cerMcis uteri Os uteri extemum- Orificium externum uteri Fig. 890.—Uterus in the Fifth Week of Pregnancy, opened from Behind. By the reniov.il of parts of the membranes the cavity of the amnion has been opened. Fundus of the uterus (muscular coat)Fundus uteri (tunica musculaiis) Placental insertion of the.,u
RM2AWMB88–A system of obstetrics . rom the chorion l?eve, theprocesses on its surfaces do not completely abort. It becomes, as thetime of birth approaches, more and more closely united with thereflexa, till the union between the two is so close that their exactboundaries cannot be made out. The umbilical vesicle (uv), althoughit becomes greatly reduced in size and flattened, persists in a recogniz-able form till the time of birth. ••A- the embryo enlarges the space between the decidua vera and decidua reflexa becomes reduced, and finally the two parts unite During the whole of pregnancy the decidua vera
RM2AWJNEX–A system of obstetrics . c umbilicus;cac, amnio-chorional cavity; pp, pleuro-peritoneal cavity: ch, chorion; mv, vitel-line membrane ; vo, umbilical vesicle. gradually more and more dis-tended by the accumulation offluid until the membrane whichcontains it is pushed out on allsides, uniting in front around theumbilical cord, and coming in con-tact throughout the whole extentof the ovum with the outer mem-brane (true chorion) already de-scribed, to which it becomes loose-ly united by a gelatinous substance,the tunica media of Bischoff. The Fully-devehped Amnion.—The amnion forms the innermost o
RM2AGBHDT–. Outlines of zoology. development is T, . . , very different from a simple Two stages m segmented ,., , ^ ^ ,. - ? - ? After case like that of Amphi- oxiis. In the latter, all the cells of the blastosphere form part of the embryo; in the former, only a few take a direct part in the process; the remainder form the wall of the embryonic sac or blastocyst, from which the yolkless yolk-sac or umbilical vesicle is later developed. A process of folding-off of the embryo occurs therefore in Mammals as in Birds and Reptiles, the chief difference being that, roughly speaking, in the former the yolk-sa
![. The elements of embryology. Embryology; Embryology. XL] THE CHORION. Fig. 117. 357. Diagrammatic Section of Pregnant Human Uterus with CONTAINED FcETUS. (From Huxley after Longet.) <il. allantoic stalk; nh. umbilical vesicle; am. amnion; ch. cho- rion ; ds. decidua serotina; du. decidua vera; dr. decidua reflexa; I. fallopian tube ; c. cervix uteri; u. uterus; z. foetal villi of true placenta; /. villi of non-placental part of chorion. The placenta has a somewhat discoidal form, with a slightly convex uterine surface and a concave embryonic surface. At its edge it is continuous both with Stock Photo](https://c8.alamy.com/comp/RCNNRR/the-elements-of-embryology-embryology-embryology-xl-the-chorion-fig-117-357-diagrammatic-section-of-pregnant-human-uterus-with-contained-fcetus-from-huxley-after-longet-ltil-allantoic-stalk-nh-umbilical-vesicle-am-amnion-ch-cho-rion-ds-decidua-serotina-du-decidua-vera-dr-decidua-reflexa-i-fallopian-tube-c-cervix-uteri-u-uterus-z-foetal-villi-of-true-placenta-villi-of-non-placental-part-of-chorion-the-placenta-has-a-somewhat-discoidal-form-with-a-slightly-convex-uterine-surface-and-a-concave-embryonic-surface-at-its-edge-it-is-continuous-both-with-RCNNRR.jpg ". The elements of embryology. Embryology; Embryology. XL] THE CHORION. Fig. 117. 357. Diagrammatic Section of Pregnant Human Uterus with CONTAINED FcETUS. (From Huxley after Longet.) <il. allantoic stalk; nh. umbilical vesicle; am. amnion; ch. cho- rion ; ds. decidua serotina; du. decidua vera; dr. decidua reflexa; I. fallopian tube ; c. cervix uteri; u. uterus; z. foetal villi of true placenta; /. villi of non-placental part of chorion. The placenta has a somewhat discoidal form, with a slightly convex uterine surface and a concave embryonic surface. At its edge it is continuous both with Stock Photo")
RMRCNNRR–. The elements of embryology. Embryology; Embryology. XL] THE CHORION. Fig. 117. 357. Diagrammatic Section of Pregnant Human Uterus with CONTAINED FcETUS. (From Huxley after Longet.) <il. allantoic stalk; nh. umbilical vesicle; am. amnion; ch. cho- rion ; ds. decidua serotina; du. decidua vera; dr. decidua reflexa; I. fallopian tube ; c. cervix uteri; u. uterus; z. foetal villi of true placenta; /. villi of non-placental part of chorion. The placenta has a somewhat discoidal form, with a slightly convex uterine surface and a concave embryonic surface. At its edge it is continuous both with
RM2AJKDBT–A manual of practical obstetrics . a, a. Projecting folds of amnion.z. Zona pellucida,or vitelline mem-brane, s. Epiblast, or ext. blasto-dermic membrane, m. Hypoblast,or int. blastodermic membrane, v.Umbilical vesicle. The letters have the same refer-ence as in Fig. 20, only the partsshown are further developed. The first structure to begin its development is the amnion.It commences as follows: A sort of hollow pouch, fold, orduplication of the epiblast projects near the caudal end of the Fig. 22. p-. Development still more advanced, a, a. Folds of amnion about to touchand join each other, p
RM2AWJNJ3–A system of obstetrics . ea> w PPT>. -PP e, embryo; ec, cephalic extremity; eg, caudalextremity; ca, amniotic hood; pp, pleuro-peritoneal cavity ; y, umbilical vesicle. Fig. 167. e, embryo; a, amnion; oa, amniotic umbilicus;cac, amnio-chorional cavity; pp, pleuro-peritoneal cavity: ch, chorion; mv, vitel-line membrane ; vo, umbilical vesicle. gradually more and more dis-tended by the accumulation offluid until the membrane whichcontains it is pushed out on allsides, uniting in front around theumbilical cord, and coming in con-tact throughout the whole extentof the ovum with the outer
RM2AWK67N–A system of obstetrics . (From Kolliker, after Bisehoff.) The Alimentary Canal at an Early Stage. A, from the ventralside ; B, in longitudinal section. In A the letters a indicate four branchial clefts; 6, the pharynx; c,c, the commencing lungs; d,the stomach ; /, commencing liver; g, part of umbilical vesicle into which the mesenteronopens: h, hind-gut. In B, a, the commencing lungs; b, the stomach ; c, the liver; d, proxi-mal part of umbilical vesicle. The fore-gut elongates as the embryo develops, and extends from thehead to the abdominal region : part of it dilates quite early in develop-m
RM2AX597D–A textbook of obstetrics . Fig. 70.—e, Embryo ; ec, cephalicextremity; eg, caudal extremity; catca, amniotic hood ; //, pp, pleuroperi-toneal cavity; j, umbilical vesicle.. Fig. 71.—r. Embryo; a, amnion; oa, amniotic umbilicus; cac, amnio-chorional cavity ; pp, pp, pleuroperito-neal cavity; ch, chorion; mv, vitel-line membrane; vo, umbilical vesicle. reinforcement from the middle layer of cells, or the mesoderm.As now the embryo begins to assume a definite shape, and thelateral walls begin to fold in toward one another, and the caudalextremity approaches a little to the cephalic end of the emb
RM2AWM7XT–A system of obstetrics . Fig. 71.—(From Allen Thomson.) Lateral View of Human Embryo between three and four weeks: AM, amnion surrounding the embryo; UV, umbilical vesicle; AL, stalk of allantois; AE, rudiment of arm; PE, rudiment of leg.Fig. 72.—(From Allen Thomson, after His.) Outlines of the Anterior Extremity of Human Embryos at different ages: A, at four weeks ; B, at rive weeks; C, at seven weeks; D, at nine or ten weeks. gram (Fig. 69) represented a cross-section in the region of the originof the limbs, they would be indicated as outgrowths of the somato-pleure a short way below the lin
RM2AWM7EG–A system of obstetrics . Fig. 71.—(From Allen Thomson.) Lateral View of Human Embryo between three and four weeks: AM, amnion surrounding the embryo; UV, umbilical vesicle; AL, stalk of allantois; AE, rudiment of arm; PE, rudiment of leg.Fig. 72.—(From Allen Thomson, after His.) Outlines of the Anterior Extremity of Human Embryos at different ages: A, at four weeks ; B, at rive weeks; C, at seven weeks; D, at nine or ten weeks. gram (Fig. 69) represented a cross-section in the region of the originof the limbs, they would be indicated as outgrowths of the somato-pleure a short way below the lin
RM2AJK9M6–A manual of practical obstetrics . Human ovum during third week. A. Amnion. A. s. Allantoic stalk.H. Heart. V. Bloodvessels of Y. s., the yolk sac, or umbilical vesicle.(From His, after Coste.) At the end of the third week the whole ovum is coveredwith chorial villi, and on cutting it open the embryo may beseen as represented, of natural size, in Fig. 33. Fig. 33.. Human ovum, with contained embryo, about the end of third week.(From Kolliker, after Allen Thompson.) The next, Fig. 34, page 86, represents a foetus near the endof the fifth week, magnified five diameters. 86 FECUNDATION AND NUTRIT
RM2AJK9WE–A manual of practical obstetrics . Hiss ovum, seen from right side. X 20 A. Amnion. A. s. Allantoisconnecting with Ch., a part of the chorion. H. Heart. V. Bloodvessels ofT. s., yolk sac, or umbilical vesicle. N. Neural groove for spinal canal. 28 and 29, page 83, was found in the womb of a woman whocommitted suicide. It was flattened from side to side, somethinglike a biconvex lens, the surface facing the decidua reflexa(shown in Fig. 29) being more convex than the other. Fringesof villi projected only from its borders, the central portions ofboth surfaces being bald and circular, that toward
RM2AWJX6R–A system of obstetrics . Fig. 148.—Human Embryo in situ within its Membranes, 4 weeks old, natural size. Fig. 149.—Human Embryo in the Fourth Week, magnified : 1, amnion removed in part of the dorsal region; 2, umbilical vesicle; 3, omphalo-mesenteric duct; 4, inferior maxillary tubercle of first pharyngeal arch; 5, superior maxillary tubercle from the same arch; 6, second pharyngeal arch ; 7, third; 8, fourth; 9, eye; 10, primitive auditory vesicle; 11, anterior extremity; 12, posterior extremity; 13, umbilical cord ; 14, heart; 15, liver. During the first month the human embryo is indistingu
RM2AJCGPA–A Reference handbook of the medical sciences embracing the entire range of scientific and practical medicine and allied science . Fig. •>U4.—Reconstruction of Embryo 2.11mm. Long. (Enlarged about 25 diameters.)al, Allantois; am, amnion; B, bellystalk ; ch, chorion ; )i, heart.; nis. nieso-dermic somite; ot^, oral fossa; ph. pha-rynx ; r, chorionic villi; 1, yolk-sac.(After Eternod.). Fig. 5143.—Profile Reconstruction of the Embr.vo, 2.1 mm. Long. No.XII. X 37 times, ^m, Amnion; OT, optic vesicle ; -il, auditoryvesicle; LF. umbilical vesicle; H, heart; TO-Vf, omphalo-mesen-teric vein; MR. se
RM2CDF9DG–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 37b.—Section through the head, umbilical vesicle and chorion. Thepharynx and first aortic arches are cut across in the head. X 10times.
RM2CDF9CY–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 37b.—Section through the head, umbilical vesicle and chorion. Thepharynx and first aortic arches are cut across in the head. X 10times.. Fig. 37c.—Section through the umbilical cord, vesicle and the chorion.X 10 times.
RM2CDF9M4–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 37a.—Photograph of the entire ovufn. Natural size. and umbilical vesicle, as shown in Figs. 37b, c and d. Thecord with its blood-vessels passes directly over into the headend of the embryo, which contains but a rudimentary nervous 162 MALL. [Vol. XIX..
RM2CDFAJ0–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 13b.—Section through the amnion, jugular veins, umbilical vesicleand chorion. X 30 times.. Fig. 13c.—Section through the umbilical vesicle as it joins the chorion.X 30 times. The large irregular space in the chorion is a blood spacewhich communicates with the veins of the embryo.
RM2CH7KJ5–. Quain's elements of anatomy . face, the form of the external auricle, and the form and attitude of the limbs. Fig. 670. Fig. 670.—Diagrammatic section of the EARLY HUMAN OVUM ACCORDING TO HiS. (From Balfour after His).Am, amnion ; Nb, umbilical vesicle. It Avould have been desirable to givesome account at this place of the rate ofprogress and the peculiarities of formand structure belonging to the successivestages of early growth and developmentin the human embryo ; but the want ofspace and the paucity of materials forsuch an account as would be satisfactoryforbid the attempt for the present
RM2CDERGA–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . the umbilical vesicle.The whole ovum was cut into serial sections. The chorion and villi are apparently normal in shape andstructure, being also very rich in blood-vessels which are filledwith embryos blood. The villi are bathed in mothers bloodand covered with an active syncytium. The decidua is some-what infiltrated with leucocytes, but there are no abscesses. The front end of the amnion is torn and its free edge and.the embryo are imbedded in reticular magma,
RM2CEHG8J–. A system of midwifery, including the diseases of pregnancy and the puerperal state. mpanying representation of the product of an abortion aboutthe twenty-fifth to the twenty-eighth day, shows the embryo and itsmembranes partly dissected, and magnified about seven times and ahalf. The Chorion, which has been opened in its whole extent, isrecognized by its villi externally, and the numerous bloodvessels on itsinternal surface. Above, and to the left, is seen the umbilical vesicle,writh the branches of the omphalo-mesenteric vessels coursing upon it.It lies, as has already been shown, between t
RM2CD89AC–. Hand-book of physiology . reaches the chorion, in the villi of which membrane the um-bilical vessels are brought into connection with the parent bymeans of the placenta, presently to be, described. In Mam-malia, the vessels conveyed by the allantois are distributedonly at that part in which the placenta exists; but in birds, * Fig. 85. The lower part of the body of a bitchs embryo, magnifiedten diameters. The mucous and vascular layers of the germinal mem-brane are turned back to shew (a) the pedicle of the umbilical vesicle atits entrance into the abdominal cavity, b, b. The two cellular ma
RM2CD8A00–. Hand-book of physiology . ll more, and extend over the body of theembryo from its abdominal towards its dorsal aspect, wherethey at length meet and coalesce, enclosing the embryo in ashut sac, the amnion (figs. 83 and 84). While the inner of the two layers of which this fold of thegerminal membrane consists forms the sac of the amnion, theouter Hnes the internal suiface of the zona pellucida, or, as it THE UMBILICAL VESICLE. 671 has now become, the chorion. The lamella forming the amnionis continuous with the skin of the embryo at the former line ofunion of the parietes of its body with the
RM2CEN68W–. The science and art of midwifery. anches whichare at first limited to the area germinativa by a circular vein, termedthe sinus terminalis. The veins, which return the blood to the embryo,occupy a lower stratum than the arteries, and empty into two shorttrunks, communicating with the auricular extremity of the heart.Subsequently the sinus terminalis disappears, and two arteries, dis-tinguished by their superior size, pass beyond the limit of the areagerminativa, now termed the area vasculosa, to extend over the sur-face of the umbilical vesicle. These vessels are known as the om-phalo-mesente
RM2CEN7AP–. The science and art of midwifery. , p. 141. 60 PHYSIOLOGY OF THE OVUM. vesicle. The larger size of the latter directs the allantois over theposterior extremity of the foetus. By its growth and extension, theallantois reaches the chorion, and forms a sort of pedicle, by means ofwhich a vascular communication is established between the embryoand the periphery of the ovum. This pedicle is the first indication ofthe umbilical cord. Its vessels become reduced to two arteries, theumbilical arteries, and a single vein, the umbilical vein. Meantime,the umbilical vesicle diminishes in size, and final
RM2CJ4AH9–. The science and art of midwifery . C) to ^ of an inch. DEVELOPMENT OF THE OVUM. 51. a: a;Fig. 12.—Diagram Bhowing earlystag*- in development of amnion.. epiblast, rising up over thedorsum of embryo to form theamniotic folds: JK allantois; it,umbilical vesicle. In describing the formation of the intestinal tube, it was noted thata portion only of the blastodermic vesicle was included by the curving inward of the inner stratum of the mesoblast, while a portion, knownas the umbilical vesicle, hung from the abdomen. The umbilical v<is lined, like the intestinal tube, by the hypoblast, and is
![. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 13d.—Embryonic vesicle attached to the chorion. X 20 times. AfterHis. No. i.] ORIGIN OF HUMAN MONSTERS. 153 The sections show that there is a double embryonic vesiclecomposed of the amnion and umbilical vesicle, the walls ofwhich are thickened and fibrous, with the embryonic layersbut poorly defined. The tissues of the vesicle and its cavityare well filled with migrating cells. The chorion is alsofibrous, with blood-vessels and migrating cells extending int Stock Photo](https://c8.alamy.com/comp/2CDFAD0/a-study-of-the-causes-underlying-the-origin-of-human-monsters-third-contribution-to-the-study-of-the-pathology-of-human-embryos-fig-13dembryonic-vesicle-attached-to-the-chorion-x-20-times-afterhis-no-i-origin-of-human-monsters-153-the-sections-show-that-there-is-a-double-embryonic-vesiclecomposed-of-the-amnion-and-umbilical-vesicle-the-walls-ofwhich-are-thickened-and-fibrous-with-the-embryonic-layersbut-poorly-defined-the-tissues-of-the-vesicle-and-its-cavityare-well-filled-with-migrating-cells-the-chorion-is-alsofibrous-with-blood-vessels-and-migrating-cells-extending-int-2CDFAD0.jpg ". A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 13d.—Embryonic vesicle attached to the chorion. X 20 times. AfterHis. No. i.] ORIGIN OF HUMAN MONSTERS. 153 The sections show that there is a double embryonic vesiclecomposed of the amnion and umbilical vesicle, the walls ofwhich are thickened and fibrous, with the embryonic layersbut poorly defined. The tissues of the vesicle and its cavityare well filled with migrating cells. The chorion is alsofibrous, with blood-vessels and migrating cells extending int Stock Photo")
RM2CDFAD0–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 13d.—Embryonic vesicle attached to the chorion. X 20 times. AfterHis. No. i.] ORIGIN OF HUMAN MONSTERS. 153 The sections show that there is a double embryonic vesiclecomposed of the amnion and umbilical vesicle, the walls ofwhich are thickened and fibrous, with the embryonic layersbut poorly defined. The tissues of the vesicle and its cavityare well filled with migrating cells. The chorion is alsofibrous, with blood-vessels and migrating cells extending int
![. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 13c.—Section through the umbilical vesicle as it joins the chorion.X 30 times. The large irregular space in the chorion is a blood spacewhich communicates with the veins of the embryo.. Fig. 13d.—Embryonic vesicle attached to the chorion. X 20 times. AfterHis. No. i.] ORIGIN OF HUMAN MONSTERS. 153 The sections show that there is a double embryonic vesiclecomposed of the amnion and umbilical vesicle, the walls ofwhich are thickened and fibrous, with the embr Stock Photo](https://c8.alamy.com/comp/2CDFAM9/a-study-of-the-causes-underlying-the-origin-of-human-monsters-third-contribution-to-the-study-of-the-pathology-of-human-embryos-fig-13csection-through-the-umbilical-vesicle-as-it-joins-the-chorionx-30-times-the-large-irregular-space-in-the-chorion-is-a-blood-spacewhich-communicates-with-the-veins-of-the-embryo-fig-13dembryonic-vesicle-attached-to-the-chorion-x-20-times-afterhis-no-i-origin-of-human-monsters-153-the-sections-show-that-there-is-a-double-embryonic-vesiclecomposed-of-the-amnion-and-umbilical-vesicle-the-walls-ofwhich-are-thickened-and-fibrous-with-the-embr-2CDFAM9.jpg ". A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 13c.—Section through the umbilical vesicle as it joins the chorion.X 30 times. The large irregular space in the chorion is a blood spacewhich communicates with the veins of the embryo.. Fig. 13d.—Embryonic vesicle attached to the chorion. X 20 times. AfterHis. No. i.] ORIGIN OF HUMAN MONSTERS. 153 The sections show that there is a double embryonic vesiclecomposed of the amnion and umbilical vesicle, the walls ofwhich are thickened and fibrous, with the embr Stock Photo")
RM2CDFAM9–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 13c.—Section through the umbilical vesicle as it joins the chorion.X 30 times. The large irregular space in the chorion is a blood spacewhich communicates with the veins of the embryo.. Fig. 13d.—Embryonic vesicle attached to the chorion. X 20 times. AfterHis. No. i.] ORIGIN OF HUMAN MONSTERS. 153 The sections show that there is a double embryonic vesiclecomposed of the amnion and umbilical vesicle, the walls ofwhich are thickened and fibrous, with the embr
RM2CH3CW5–. Quain's elements of anatomy . he embryo;uv, umbilical vesicle; al, allantoid pedicle :a,e, anterior extremity ; pe, posterior extremity ;iihe Wolifian ridge passing between them. The lappet or bud which first showsitself appears to correspond most nearlywdth the distal segment comprising thehand or foot, the other two segmentsbeing successively developed betweenit and the root or girdle at an earlyperiod. The new part shows itself first by the notched separation of a segment between the terminal one andthe side of the body, corresponding to the forearm or lower leg, andthis is followed by th
RM2CDE6YA–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . amountof reticular magma, within which there is embedded a largesac (5 mm. in diameter) containing a nodule (.5 mm. indiameter)—the embryo. Sections show that the whole chorion is lined with theamnion except at the point of the inclosed sac, which provesto be the exocoelom. The embryo is composed of an amor-phous mass of cells which invade the mesoderm of the chorion.It may represent the last remnant of the umbilical vesicle.No traces of blood-vessels are seen i
RM2CDFB5X–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 12b.—Diagrammatic reconstruction of half the ovum with the embryoattached. X 10 times. The villi are drawn upon the upper half ofthe diagram only. Coe, coelom; uv, umbilical vesicle; all, allantois;Dip, medullary plate. the central canal too wide open, and the optic vesicles tooatrophic to be normal. The spinal cord is also too wide openbehind. The embryo could be viewed as normal with the ex-ception of the spina bifida in the lower part of the cord andthe
RM2CJ5BF1–. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . Fig. 79.—Diagrammatic longitudinal sectionoosperm of rabbit at an advanced stage of preg-nancy (KOlliker, after Bischoff). a, amnion; al,allantois with its blood-vessels; e, embryo ; ds,yelk-sac ; ed, ed, ed, hypoblastic epithelium ofthe yelk-sac and its stalk (umbilical vesicle andcord); fd, vascular mesoblastic membrane of theumbilical cord and vesicle ; pi, placental villiformed by the allantois and subzonal membrane;r, space filled with fluid between the amnion,the allantois. and t
RM2CEN8BM–. The science and art of midwifery. Fig. 47.—1, exocborion ; 2, blastodermicchorion ; ?/, umbilical vesicle ; a, am-nion ; p, pedicle of allantois. in the form of an embankmentAt this time the umbilical vesicle Fig. 48.. Fig. 1.—Human embryon, at the ninth week, removed from the membranes; three times the natural size (Erdl).Fig. 2.—Human embryon, at the twelfth week, inclosed in the amnion; natural size (Erdl). DEVELOPMENT OF THE OVUM. 53 is still very large. The allantois, like the umbilical vesicle and theintestine, is composed of two layers derived respectively from the in-ternal layer of
RM2CJ47KA–. The science and art of midwifery . Fig. i.). i. exochorion : 8, endochorion ; r,umbilical vesicle; i. amnion; P, pedi-cle of allantois. Plate III.. Fig. 1.—Human embryon, at the ninth week, removed from the membranes; three times the natural siz*> (Erdl).Fio. 2.— Human embryon, at the twelfth week inclosed in the amnion; natural bum (Erdl). DEVELOPMENT OF THE OVUM. ;,;; week the allantois reaches the chorion, over which it spreads and formsa complete vascular lining. According to the usual acceptation, thevessels of the allantois everywhere penetrate into the villi of thechorion. Then the
RM2CDE8JX–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 346.—Embryo attached to the ovum. X 2 times. structures of the chorion, amnion and cord appear normal,but the umbilical vesicle is filled with a necrotic mass. The embryo is dissociated and macerated. The centralnervous system is dilated and the heart is distended withblood, some of which infiltrates the surrounding tissues. 336 MALL. [Vol. XIX. No. 347. Ovum, 40 x 35 x 30 mm.; embryo, C. R., 11 mm. If thehead is replaced the C. R. measurement will be less
RM2CJDN86–. A text-book of comparative physiology for students and practitioners of comparative (veterinary) medicine . 76 COMPARATIVE PHYSIOLOGY. yelk-sac {umbilical vesicle of the mammalian embryo). Themanner in which this takes place will appear npon an inspec-tion of the accompanying figures. Very early in the history of the embryo two eminences, thehead and the tail folds, arise, and, curving over toward each MO.. Fig. 70.—Diagrammatic longitudinal section through the axis of an embryo chick(after Foster and Balfour). N. C, Neural canal; Ch, notochord; Fg, foregnt;F. So, somatopleure; F. Sp, splanc
RM2CEN8WF–. The science and art of midwifery. t now becomes a matter of importance for us to consider thesources from which the embryo receives the nutritive materials requi-site for its further growth and development. We have seen already that the ovum, in its passage through the Fig. 43.—Section through the ovum of chickafter development of umbilical vesicle.c h, chorda dorsalis ; t to, tuba medultaris ;o to, outer layer of mesoderm, from whichare formed the bony skeleton, the blood-vessels, and large muscles of the trunk;ect, ectoderm ; int, intestinal tube,formed from the inner stratum of themesoder
![. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 302.—Section of the embryo. X 16 times. No. i.] ORIGIN OF HUMAN MONSTERS. 293 Within the chorion there is a vesicle (amniotic) one centi-meter in diameter imbedded in much magma reticule. Thisin turn is filled with granular magma, in which there is anembryo about 3^2 weeks old. The umbilical vesicle is de-generated and lies in the reticular magma. The blood-vessels and tissues of the embryo are gorgedwith blood and the outlines of the organs are obliterated Stock Photo](https://c8.alamy.com/comp/2CDEEPY/a-study-of-the-causes-underlying-the-origin-of-human-monsters-third-contribution-to-the-study-of-the-pathology-of-human-embryos-fig-302section-of-the-embryo-x-16-times-no-i-origin-of-human-monsters-293-within-the-chorion-there-is-a-vesicle-amniotic-one-centi-meter-in-diameter-imbedded-in-much-magma-reticule-thisin-turn-is-filled-with-granular-magma-in-which-there-is-anembryo-about-32-weeks-old-the-umbilical-vesicle-is-de-generated-and-lies-in-the-reticular-magma-the-blood-vessels-and-tissues-of-the-embryo-are-gorgedwith-blood-and-the-outlines-of-the-organs-are-obliterated-2CDEEPY.jpg ". A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 302.—Section of the embryo. X 16 times. No. i.] ORIGIN OF HUMAN MONSTERS. 293 Within the chorion there is a vesicle (amniotic) one centi-meter in diameter imbedded in much magma reticule. Thisin turn is filled with granular magma, in which there is anembryo about 3^2 weeks old. The umbilical vesicle is de-generated and lies in the reticular magma. The blood-vessels and tissues of the embryo are gorgedwith blood and the outlines of the organs are obliterated Stock Photo")
RM2CDEEPY–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 302.—Section of the embryo. X 16 times. No. i.] ORIGIN OF HUMAN MONSTERS. 293 Within the chorion there is a vesicle (amniotic) one centi-meter in diameter imbedded in much magma reticule. Thisin turn is filled with granular magma, in which there is anembryo about 3^2 weeks old. The umbilical vesicle is de-generated and lies in the reticular magma. The blood-vessels and tissues of the embryo are gorgedwith blood and the outlines of the organs are obliterated
RM2CEN8MY–. The science and art of midwifery. Fig. 45.—Diagram showing completion ofthe amnion and formation of the chori-on, a, amnion ; 2, outer lamina of theectoderm after closure of amniotic folds ;p, allantois ; «, umbilical vesicle. 52 PHYSIOLOGY OF THE OVUM.. Fig. 46.—Human embryo, at the third week, show-ing villi covering the entire chorion. (Haeckel.) sists simply of the zona pellucida or vitelline membrane. As the ovumis received into the uterus, the vitelline membrane becomes covered with amorphous villi, whichhelp to fix the ovum in theuterine cavity. After the completion ofthe amnion by th
RM2CGPM4X–. Quain's elements of anatomy . A, upper half of the body ofa human embryo of three weeks,viewed from the abdominal side(from Coste); a, frontal jiUite ;h, protovertebrffi, on whichthe i^rimitive aortte are lying ;3, the middle of the tube of theheart, below it the place of en-trance of the great veins, aboveit the aortic bulb. B, lateral view of a humanembryo more advanced than that last refen-ed to (from A. Thomson); a, the frontal part of the head ; h, the vertebralcolumn ; v, the v/ide communication of the umbilical vesicle with the intestine ; u,allantoic pedicle; 2, auricular part of the
RM2CDF58M–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. 87a.—Additional vesicle on the side of the ovum opposite the em-bryo. Enlarged 2 times. umbilical vesicle. It lies free in the cavity of the coelom im-bedded within the magma, and is in no way torn. It is com-posed of three distinct layers: a thick middle layer, in whichare numerous blood islands, an epithelial lining layer, and anoutside layer, which does not completely cover the specimen.On one side of the vesicle there is a sharp invagination of allthree
RM2CDFAW1–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . ilethe uterus was making ready to expel the ovum. No. 13. Ovum, 8x7 mm.; vesicle within, 1.4 x .85 mm. From Professor His, Leipzig. This embryo is the well-known specimen No. 44 of the Hiscollection. (See Anatomie mensch. Embryonen, II, pp. 32and 87.) The ovum is not completely covered with villi. Fig. 13a.—Section through the umbilical vesicle and chorion of specimenNo. 13, Hiss No. 44. Blood corpuscles are seen within the cavityof the vesicle. X 30 times. With
![. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. I2c.—From a reconstruction in wax. X 40 times. Cs, eighth cervicalmyotome; OV, optic vesicle; AV, auditory vesicle; H, heart; VOM,yolk vein; P, coelom; UV, umbilical vesicle; O3, third occipital myo-tome; All, allantois; Am, amnion.. Fig. I2d.—View of the embryo to show the open spinal cord below andthe atrophic head with large neuropore. No. i.] ORIGIN OF HUMAN MONSTERS. 151 Sections of the chorion indicate also that it is practicallynormal with the except Stock Photo](https://c8.alamy.com/comp/2CDFAWN/a-study-of-the-causes-underlying-the-origin-of-human-monsters-third-contribution-to-the-study-of-the-pathology-of-human-embryos-fig-i2cfrom-a-reconstruction-in-wax-x-40-times-cs-eighth-cervicalmyotome-ov-optic-vesicle-av-auditory-vesicle-h-heart-vomyolk-vein-p-coelom-uv-umbilical-vesicle-o3-third-occipital-myo-tome-all-allantois-am-amnion-fig-i2dview-of-the-embryo-to-show-the-open-spinal-cord-below-andthe-atrophic-head-with-large-neuropore-no-i-origin-of-human-monsters-151-sections-of-the-chorion-indicate-also-that-it-is-practicallynormal-with-the-except-2CDFAWN.jpg ". A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. I2c.—From a reconstruction in wax. X 40 times. Cs, eighth cervicalmyotome; OV, optic vesicle; AV, auditory vesicle; H, heart; VOM,yolk vein; P, coelom; UV, umbilical vesicle; O3, third occipital myo-tome; All, allantois; Am, amnion.. Fig. I2d.—View of the embryo to show the open spinal cord below andthe atrophic head with large neuropore. No. i.] ORIGIN OF HUMAN MONSTERS. 151 Sections of the chorion indicate also that it is practicallynormal with the except Stock Photo")
RM2CDFAWN–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . Fig. I2c.—From a reconstruction in wax. X 40 times. Cs, eighth cervicalmyotome; OV, optic vesicle; AV, auditory vesicle; H, heart; VOM,yolk vein; P, coelom; UV, umbilical vesicle; O3, third occipital myo-tome; All, allantois; Am, amnion.. Fig. I2d.—View of the embryo to show the open spinal cord below andthe atrophic head with large neuropore. No. i.] ORIGIN OF HUMAN MONSTERS. 151 Sections of the chorion indicate also that it is practicallynormal with the except
![. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . ::. : .^V{i- ^mg- I St. —M Fig. 304c.—Section of the villi and surrounding tissue. X 65 times.D, decidua; 5. syncytium; V, villus; Ch, chorion; M, mucoid sub-stance rich in leucocytes. No. i.] ORIGIN OF HUMAN MONSTERS. 295 of uterine mucous membrane, showing that an extensive in-flammatory deposit cuts off the normal nutrition of the ovum.The ovum is partly filled with magma reticule, in whichthere is imbedded an umbilical vesicle two millimeters indiameter att Stock Photo](https://c8.alamy.com/comp/2CDEEHF/a-study-of-the-causes-underlying-the-origin-of-human-monsters-third-contribution-to-the-study-of-the-pathology-of-human-embryos-vi-mg-i-st-m-fig-304csection-of-the-villi-and-surrounding-tissue-x-65-timesd-decidua-5-syncytium-v-villus-ch-chorion-m-mucoid-sub-stance-rich-in-leucocytes-no-i-origin-of-human-monsters-295-of-uterine-mucous-membrane-showing-that-an-extensive-in-flammatory-deposit-cuts-off-the-normal-nutrition-of-the-ovumthe-ovum-is-partly-filled-with-magma-reticule-in-whichthere-is-imbedded-an-umbilical-vesicle-two-millimeters-indiameter-att-2CDEEHF.jpg ". A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . ::. : .^V{i- ^mg- I St. —M Fig. 304c.—Section of the villi and surrounding tissue. X 65 times.D, decidua; 5. syncytium; V, villus; Ch, chorion; M, mucoid sub-stance rich in leucocytes. No. i.] ORIGIN OF HUMAN MONSTERS. 295 of uterine mucous membrane, showing that an extensive in-flammatory deposit cuts off the normal nutrition of the ovum.The ovum is partly filled with magma reticule, in whichthere is imbedded an umbilical vesicle two millimeters indiameter att Stock Photo")
RM2CDEEHF–. A study of the causes underlying the origin of human monsters : third contribution to the study of the pathology of human embryos . ::. : .^V{i- ^mg- I St. —M Fig. 304c.—Section of the villi and surrounding tissue. X 65 times.D, decidua; 5. syncytium; V, villus; Ch, chorion; M, mucoid sub-stance rich in leucocytes. No. i.] ORIGIN OF HUMAN MONSTERS. 295 of uterine mucous membrane, showing that an extensive in-flammatory deposit cuts off the normal nutrition of the ovum.The ovum is partly filled with magma reticule, in whichthere is imbedded an umbilical vesicle two millimeters indiameter att
RMREFFX2–. The comparative anatomy of the domesticated animals. Veterinary anatomy. 901 EMBRYOLOGY. COMPABISON OP THE ANNEXES OF THE HDMAN FCETTS WITH THOSE OP ANIMALS. The human fcetus, like that of the domesticated mammals, is enveloped by an amnion and chorion, which are generally identical in disposition with those already described. The umbilical vesicle submits to the same change as in the Mare, becoming so quickly atrophied that scarcely any traces of it can be found at birth. It is impossible to isolate the amnion from the inner face of the chorion; so that some anatomists only admit its presen
RMRE4G49–. The comparative anatomy of the domesticated animals. Veterinary anatomy. 90i EMBBYOLOar. COMPARISON OF THE ANNEXES OP THE HOMAN ECETUS -WITH THOSE OP ANIMALS. The human fcetus, like that of the domesticated mammals, is enveloped by an amnion and chorion which are generally identical in disposition with those already described. The umbilical vesicle submits to the same change as in the Mare, becoming so quickly atroohied that scarcely any traces of it can be found at birth. It is impossible to isolate the amnion from the inner face of the chorion; so that some anatomists only admit its presen
RMRPXMF8–. The comparative anatomy of the domesticated animals. Veterinary anatomy. 904 EMBRYOLOGY, COMPARISON OF THE ANNEXES OP THE HDMAN FCETUS WITH THOSE OF ANIMALS. The human foetus, like that of the domesticated mammals, is enveloped by an amnion and chorion, which are generally identical^in disposition with those already described. The umbilical vesicle submits to the same change as in the Mare, becoming so quickly atrophied that scarcely any traces of it can be found at birth. It is impossible to isolate the amnion from the inner face of the chorion; so that some anatomists only admit its presen
RMRH80W5–. Bovine obstetrics. Veterinary obstetrics. THE ANNEXES OF THE FOETUS 15 II. THE F(ETÜS AND ITS ANNEXES. 1.—The Annexes of the Foetus. At the moment the product of conception possesses all its organs, it is termed a foetu-^i. The foetus is si;rrounded by ^^. Fig. 7.—Foetal Membranes. o. Amnion ; h, foetal placent». its annexes, protecting it against external influences, insuring nutrition and union with the mother. They are : the chorion, with the placentae foetalis ; the amnion, the allantois, ov so-caWed foetal urinary bladder; the umbilical vesicle and the umhilical. Please note that these
RMRN5G27–. Anatomy, descriptive and applied. Anatomy. THE JEJUNUM AND ILEUM 1289 portion of the intestine by a fibrous .band. It represents the remains of the vitelline or omphalomesenteric duct, the duct of communication between the umbilical vesicle and the alimentary canal in early fetal life. Structure of the Small Intestine, Including the Duodenum.—The wall of the small intestine is composed of four coats—serous, muscular, subm.ucous, and mucous. The Serous Coat {tunica serosa).—The relation of the jieritoneum to the duodenum has been described. The remaining portion of the small intestine is surr
RMREFG11–. The comparative anatomy of the domesticated animals. Veterinary anatomy. 896 EMBRYOLOGY. placental tufts. It adheres to the internal surface of the uterus. Between the two membranes there is found a small quantity of sanguinolent fluid. The internal face, lined by the external layer of the allantois, is united in the closest manner to that membrane, except at the umbilical cord, where there exists a kind of conical infundibulum occupied by the umbilical vesicle. Structure.—The chorion is a delicate fibrous membrane, traversed by the vascular ramifications of the placenta. It is formed by the
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