The previous page is sending you to https://www.alamy.com/biology-of-the-vertebrates-a-comparative-study-of-man-and-his-animal-allies-vertebrates-vertebrates-anatomy-anatomy-comparative-lagena-f-outturns-malleus-pharynxquot-laaena-eustachian-tube-vvmalleu-cochlea-fig-691-diagrams-of-stages-in-the-development-of-the-ear-after-brandt-across-the-inner-end-of-the-auditory-canal-and-separating-it-from-the-middle-ear-is-the-quotear-drumquot-or-external-tympanic-membrane-which-is-attached-in-a-groove-the-tympanic-sulcus-in-man-it-is-about-1-mm-thick-and-10-mm-in-diameter-being-slightly-thicker-in-the-center-than-aro-image234593151.html.

 If you do not want to visit that page, you can return to the previous page.