Reproductive System - THE REPRODUCTIVE SYSTEMS 2. 3. 4. 5....

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THE REPRODUCTIVE SYSTEMS 2. Overview of reproduction 3. Male reproductive system -- scrotum 4. Testis 5. Spermatogenesis 6. Spermiogenesis 7. Hormonal control of male reproduction 8. The spermatic ducts 9. Urethra 10. Accessory sex glands 11. Semen (seminal fluid) 12. Penis 13. Female reproductive organs 14. Ovary 15. Oögenesis 16. Follicles and the ovarian cycle I 17. Follicles and the ovarian cycle II 18. Uterine tubes 19. Uterus 20. Vagina 21. External genitalia and the perineum 22. The breasts and mammary glands 23. Female reproductive cycle 24. Estrogen secretion and control 25. Female cycle phases I 26. Female cycle phases II 27. Sexual responses
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What is the essential difference between mitosis and meiosis? OVERVIEW OF REPRODUCTION biparental, and therefore not genetically identical gametes fertilization produces a zygote, which has its own genetics What is the essence of reproduction? Role of the male produce sperm introduce sperm into the female body Role of the female produce ova (eggs) receive sperm and provide for union of the gametes harbor an embryo/fetus and give birth nourish offspring Primary sex organs (gonads – ovaries and testes) Secondary sex organs – everything else related to reproduction
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Dartos’ fascia (muscle) Cremaster muscle Temperature regulation Cremaster reflex Descent of the testes MALE REPRODUCTIVE SYSTEM -- SCROTUM deep inguinal ring inguinal canal superficial inguinal ring scrotum epididymis Dartos’ fascia testis ductus deferens internal abdominal oblique muscle cremaster muscle skin of scrotum transverse section of penis scrotal septum inguinal canal superficial ring ductus deferens testicular artery pampiniform plexus autonomic nerves Spermatic cord ductus deferens testicular artery pampiniform plexus epididymis Dartos’ fascia tunica albuginea of testis
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Tunica vaginalis Tunica albuginea 250-300 lobules Seminiferous tubules Germinal epithelium TESTIS tunica albuginea covering testis tunica vaginalis seminiferous tubule septa lobule lumen germinal epithelium seminiferous tubule two cell types germ cells = spermatogenesis sustentacular (Sertoli) cells = spermiogenesis secrete inhibin basement membrane Interstitial cells (of Leydig) secrete testosterone
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Spermatogonium (2n2c) SPERMATOGENESIS mitosis meiosis first meiotic division 1º spermatocyte (2n4c) 2 2º spermatocytes (1n2c) second meiotic division 4 spermatids (1n1c) begin spermiogenesis basement membrane + interstitial tissue Leydig cells spermatogonia spermatocytes spermatocytes and spermatids spermatozoa Sertoli cell lumen spermatogonium spermatocyte spermatocytes and spermatids spermatozoa
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Sustentacular (Sertoli) cell SPERMIOGENESIS nourishment waste removal blood-testis barrier Anatomical maturation head (nucleus + acrosome) midpiece (mitochondria) tail (flagellum) 300 million sperm/day SEM of sperm in lumen of seminiferous tubule head midpiece tail acrosome nucleus mitochondria flagellum sperm 2 sperm 1
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This note was uploaded on 12/08/2011 for the course AMY 2B taught by Professor Dianeolin during the Summer '09 term at Riverside Community College.

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Reproductive System - THE REPRODUCTIVE SYSTEMS 2. 3. 4. 5....

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