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22 Cards in this Set
- Front
- Back
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testes
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testicles, male gonads
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exocrine glands
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produce sperm into ducts
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endocrine glands
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produce androgens into blood
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2"x1"
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size of testis
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partial tunica vaginalis
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sac derived from peritoneum during descent, cover testes
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tunica albuginea
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tough and fibrous, encapsulates each testis
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28th week of development
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testes development in fetus
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route of testes development
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through inguinal canal to scrotum, gubernaculum testis, cryptorchidism
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gubernaculum testis
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fibromuscular cord that guides testes and anchor testes in scrotum
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cryptorchidism
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failure of testes to descend, sterility due to high temperature
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divides testes into 200-300 lobules
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tunica albuginea with septa (inward expansions)
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seminiferous tubules
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located in each lobule in highly coiled situation, location of spermatogenesis, contain sertoli, interstitial endocrinocytes
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spermatogenesis
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sperm production occurs in seminiferous tubules, meiotic process triggered by FSH and takes 74 days, 10's of thousands produced /sec
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sertoli
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sustentacular cells, with developing sperm embedded between them, produce nutrients, joined by tight junctions forming blood testes barrier
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interstitial endocrinocytes
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interstitial cells between seminiferous tubules that secrete male hormone testosterone
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spermatazoa modification
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highly modified to reaching and penetrating protective ovum barriers
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spermatazoa parts
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head, midpiece, tail
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head
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nucleus with genetic material, has acrosome
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acrosome
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specialized lysosome in spermatazoa head with hyaluronidase and proteases to penetrate ovum
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midpiece
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numeorus mitochondria whcih provide energy for sperm locomotion
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tail
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has a typical flagellum, propels the sperm
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male reproductive system duct path
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seminiferous tubules, straight tubules (tubuli recti), rete testes (network of ducts), efferent ducts (exit testes, ductus epididymus (about 6 m long)
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