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Understanding Secondary Sexual Development
- 1. SECONDARY SEXUAL CHARACTERS B. Sc. B.Ed. integrated
- 3. Secondary sexual characters In boys • Appearance of moustaches and beard. • Growth of hair on the chest, under the arms and pubic area. In girls • Development of breasts. • The growth of hair under the arms and the pubic area
- 4. Development of secondary sexual characters • Secondary sexual characters are physical changes with starts occurring during adolescence. • Hormones are the chemicals substances which are released by the glands. • Glands are organs which are assigned to produce the hormones.
- 5. hormones Characters are initiated by hormones. Hormones are the chemical substances. They are produced by glands. Glands are the organs in your body which are specially assigned to secrete hormones.
- 6. Endocrine glands • Glands which secrete the hormone directly into bloodstream .(ductless) • Each hormone has a specific target site. • They don’t act upon the whole body.
- 10. Role of hormones
- 11. .. If reproductive life, once begun, continues, or it ends sometime. And why?
- 12. Questions Name the hormone in females that is produced by ovaries? Which gland is called master gland?
- 13. what this picture indicates
- 14. Reproductive phase Reproductive ………. process of reproduction Phase ………… time period. Female are capable of reproduction only for some period of time.
- 15. Reproductive phase of life in humans • Adolescents become capable of reproduction when their testes and ovaries begin to produce gametes. • The capacity for maturation and production of gametes is longer in males. • In females, reproductive phase begin at 10 to 12 years & lasts till the age of 45 to 50 years. • When females hit puberty, the eggs or ova start getting mature.
- 16. ,,,, • One of the ovaries then releases the mature ovum around 28 to 30 days. • The wall of the uterus at this time, when the egg is released, becomes thick to hold the egg in case if fertilization occurs & develops. • When the fertilization does not take place, the lining of the uterus sheds along with the egg and the blood vessels. • This results in MENSTRUATION .
- 18. mbh • The first menstruation flow occurs at puberty and is called the MENARCHE. • The stopping of menstrual cycle in the age between 45 to 50 years is called MENOPAUSE.
- 19. Organisms aren’t immortal they eventually die. so who will make sure that organisms will still exists in nature a simple and efficient system in us make sure that the species will keep going even after we die .
- 20. In female reproduction starts with menarche and stop with menopause.so will it be same in males?
- 21. ,,, Q. when does the reproduction process of males start and when does it end?
- 22. State true or false Q. Ovulation occurs at the onset of menstrual cycle.
- 23. Questions • following can lead to a menstrual cycle? a)Fertilization of egg b)Unfertilized egg. c) Improper sleep. d)Study pressure. • The first menstrual flow is called as …… a)Menopause b)Menstruation c) Menarche • ovulation
- 24. Do know these sign? When we use these sign?
- 25. Paheli: I heard my mother and my aunty talking about my cousin who is going to have a baby. They were discussing whether she would give birth to a boy or a girl. I wonder what makes the fertilized egg develop either into a boy or a girl.
- 27. Can you label it?
- 28. mm Q. a family of five daughters only is expecting sixth issue. The chance of its being a son is a)0% b)25% c)50% d)100%
- 29. RECAPITULATION: Explain secondary sexual character. Difference physical appearance between male and female. What is hormone? Define endocrine glands. Explain menstrual cycle and various phases. What are chromosomes?
- 30. HOME WORK: Q. what are sex hormones? Why are they named so? State their function. Q. draw menstruation cycle. And explain it.