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Biology 322 Human Anatomy I

Biology 322 Human Anatomy I. Female Reproductive System. Human Reproductive System : - Begins developing - Remains “sexually indifferent” . Male Female. 7 th & 8 th Testes, penis, Clitoris, labia begin weeks scrotum begin development

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Biology 322 Human Anatomy I

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  1. Biology 322Human Anatomy I Female Reproductive System

  2. Human Reproductive System: - Begins developing - Remains “sexually indifferent”

  3. MaleFemale 7th & 8th Testes, penis, Clitoris, labia begin weeks scrotum begin development development Both sexes: Gonads (ovaries & testes) remain inactive until puberty, when anterior pituitary stimulates maturation

  4. Organs of adult female reproductive system - Midsagittal

  5. Pubic Bone

  6. Organs of female reproductive system – Coronal from back

  7. Broad Ligament: Parasagittal section

  8. Ovary: Site of oocyte development & ovulation after puberty

  9. Ovary Cortex Medulla Tunica Albuginea

  10. Maturation of an oocyte is called oogenesis Cell with 46 chromosomes (“2n”) divides twice, unevenly, to produce one large oocyte with 23 chromosomes (“n”) and two small polar bodies. During oogenesis, oocyte surrounded by follicle composed of follicular cells or granulosa cells

  11. The developing oocyte and its follicle:Four stages before ovulation 1.

  12. The developing oocyte and its follicle:Four stages before ovulation 2.

  13. The developing oocyte and its follicle:Four stages before ovulation 3.

  14. The developing oocyte and its follicle:Four stages before ovulation 4. Oocyte covered with thick, clear membrane called pushed to one side in follicle and surrounded by mass of follicular cells called

  15. Ovulation: Secondary oocyte, surrounded by zona pellucida and cumulus oophorus, released from surface of ovary, where it can be captured by the open end of the oviduct. The cumulus oophorus now called the corona radiata.

  16. After ovulation,

  17. Oviduct: Lateral End: Middle Part: Medial End:

  18. Layers of Oviduct:

  19. By mechanisms not completely understood: • The oviduct moves the oocyte toward the uterus • The oviduct moves sperm away from the uterus Fertilization occurs in ampulla of oviduct, forming the zygote, which goes through repeated mitotic cell divisions (“cleavage”) to form a morula, then a blastocyst, and eventually the embryo.

  20. Uterus: Anterior Posterior & superior Narrowed inferiorly

  21. Uterus: Three Layers (internal) : Lots of glands & blood vessels Thick layer of smooth muscle Visceral peritoneum over thin layer of C.T. (external)

  22. Two layers Closer to myometrium; Remains after menstruation; Regrows functional layer. Closer to cavity; Thickens every cycle; Embryo implants here during pregnancy; Dies and falls off during menstruation

  23. Vagina: Thin-walled, tubular Inferior Anterior Posterior

  24. Layers of Vagina: Mucosa: Muscularis: Adventitia:

  25. External Genitalia:

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