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Human Reproduction and Development

Human Reproduction and Development. OR. True or false?. You can’t get pregnant the first time you have sex. True or false?. You can’t get pregnant the first time you have sex. FALSE. True or false?. Sperm can live for up to 3 days inside a woman’s body. True or false?.

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Human Reproduction and Development

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  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

  38. The Uterine Cycle

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

  40. Human Development

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

  42. Fertilization

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

  44. Fertilization sperm head

  45. Biology 100 Human Biology Fertilization

  46. Fertilization first polar body metaphase of second meiotic division

  47. Fertilization sperm pronucleus polar bodies oocyte pronucleus

  48. Cleavage

  49. Cleavage

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