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24_Male Reproduction

24_Male Reproduction - MALE REPRODUCTIVE SYSTEM Chapter 28...

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MALE REPRODUCTIVE SYSTEM Chapter 28
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Gross Anatomy of the Male 1. Scrotum 2. Testis 1. Epididymis 1. Ductus (vas) deferens 2. Seminal vesicles 3. Ejaculatory duct 4. Prostate gland 5. Bulbourethral gland 6. Urethra 7. Penis
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Scrotum Skin covered sac that holds the testes Provides cooler temperature needed for normal sperm development and maturation 3 degrees Celsius lower than internal body (93.2 degrees F) Raphe External ridge-like seam Median septum Dartos muscle Contracts and relaxes to wrinkle and unwrinkle the scrotum Thermoregulation of testis Median septum
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Spermatic Cord Connective tissue cord that runs from testis through inguinal canal of the inguinal ligament Ductus deferens Cremaster muscle Contracts and relaxes to lift and lower the testes Thermoregulation Testicular vessels and nerves Pampiniform plexus Network of testicular veins Thermoregulation - pre- cooling of arterial blood
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Anatomy of the Testes Produce sperm and androgens Covered by tunica vaginalis and tunica albuginea Testicular lobules contain up to four seminiferous tubules Efferent ductules Connect testis to epididymis
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Microscopic Anatomy Sustentacular (Sertoli) cells Line seminiferous tubules Form blood-testis barrier Assist with sperm development
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