Human Reproduction and Development

1. Human Reproduction and Development

2. OR

3. True or false? You can’t get pregnant the first time you have sex.

4. True or false? You can’t get pregnant the first time you have sex. FALSE

5. True or false? Sperm can live for up to 3 days inside a woman’s body.

6. True or false? Sperm can live for up to 3 days inside a woman’s body. TRUE

7. True or false? You can’t get pregnant if you have sex standing up

8. True or false? You can’t get pregnant if you have sex standing up FALSE

9. True or false? Condoms help to prevent the spread of sexually transmitted diseases.

10. True or false? Condoms help to prevent the spread of sexually transmitted diseases. TRUE

11. True or false? Taking the pill means you can’t get pregnant.

12. True or false? Taking the pill means you can’t get pregnant. FALSE

13. True or false? You can’t get pregnant during a period.

14. True or false? You can’t get pregnant during a period. FALSE

15. True or false? The pill stops you from getting diseases

16. True or false? The pill stops you from getting diseases FALSE

17. Similarities and differences between males and females, but same goal: new life Primary sex organs: gonads Testes in males Ovaries in females These produce the gametes (sex cells) Sperm in males Ovum (egg) in females Endocrine function also: secretion of hormones Accessory sex organs Internal glands and ducts External genitalia

18. Male Reproductive System

19. Male Reproductive System

20. Accessory glands help sperm survive • Seminal Fluid • Seminal Vesicles • Prostate Gland • Bulbourethral Glands

21. Testis blood vessels & nerves vas deferens Seminiferous tubules rete testes lobule septum epididymis

22. The Penis

23. Spermatogenesis

24. Seminiferous Tubules

25. Interstitial cells = Leydig cells Makes testosterone Sustentacular = Makes ABP

26. Spermatogenesis

27. acrosome head nucleus tail mitochondria Mature Spermatozoa

28. Hormones Involved in Spermatogenesis • Hypothalamus: Gonadotropin Releasing Hormone (GnRH) to anterior pituitary • Anterior Pituitary: Follicle Stimulating Hormone (FSH) to sertoli cells • Anterior Pituitary: Interstitial Cell Stimulating Hormone (ICSH) to Interstitial cells in testes • Testes: Interstitial cells (Leydig)- Testosterone Testes: Sertoli cells(sustentacular)- ABP • Testes: Inhibin

29. Some Other Effects of Testosterone • muscle and bone growth • facial and pubic hair growth • thickening of vocal cords • sex drive • stimulates sebaceous glands • Increases BMR

30. Vasectomy

31. Female Reproductive System

32. fimbriae uterine tube ovary uterus Bladder cervix urethra clitoris vagina

33. egg Biology 100 Human Biology uterine tube ovary ovary uterus endometrium cervix vagina

34. Oogenesis in the Ovary

35. Oogenesis

36. oocyte

37. Hormones Involved in the Female Reproductive Cycle • Hypothalamus: GnRH • Anterior Pituitary: FSH • Anterior Pituitary: LH • Ovary: Estrogen • Ovary: Progesterone • Ovary: Relaxin • Ovary: Inhibin

39. The Uterine Cycle

40. Some Other Effects of Estrogen • breast development • external genitalia growth • bone growth • fat deposition

41. Human Development

42. Stages of Development Pre-Embryonic Development Fertilization Cleavage Embryonic Development Gastrulation Organogenesis Fetal Development

43. Fertilization

44. human chorionic gonadotropin estrogen Relative Blood Levels progesterone Fertilization Delivery

45. Fertilization sperm head

46. Biology 100 Human Biology Fertilization

47. Fertilization first polar body metaphase of second meiotic division

48. Fertilization sperm pronucleus polar bodies oocyte pronucleus

49. Cleavage

50. Cleavage