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In males, gametes are produced in the seminiferous tubules of the testes. mammalian testicles consist of the following parts Vas deferens. Epididymis Semispherical tubules Semispherical tubule: The testicles consist of seminiferous tubules that produce sperm Each tubule is surrounded by a basement membrane that is lined by the germ line epithelia. The germinal epithelium divides by mitosis to form spermatogonia (which is divided by meiosis to form spermatids).
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Spermatids differentiate into functional sperm, which are subsequently released into the lumen of the tubule.
These developing sperm are nourished by Sertoli cells that reside in the tubule lining. Outside the tubules are blood capillaries and interstitial cells (Leydig cells) which produce testosterone.
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Cross-sections of male reproductive tissue: Spermatogenesis in the seminiferous tubules begins on the outer lining of the tubule (germinal epithelium). As germ cells divide by meiosis, they move toward the inner lining before being released into the lumen as sperm.
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Each cycle, one follicle becomes the dominant Graafian follicle and ruptures to release the secondary oocyte.
o A short-lived corpus luteum then develops from the ruptured follicle, which secretes key ovarian hormones.