Male anatomy and hormones
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Follicle stimulating hormone (FSH) | causes seminiferous tubules to enlarge, stimulates spermatocytes in the testes to begin dividing.
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Luteinizing hormone (LH) | stimulates interstitial cells to begin to secrete testosterone
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testosterone | causes development of male sexual characteristics
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ejaculation amount | 2-5 mL of semen released containing 100-500 million spermatozoa
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Erectile tissue of penis: two columns - corpora cavernosa | located along the upper surface of the penis
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Eerectile tissue of penis: third column - corpus spongiosum | centered along the underside of the penis
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vas deferens | long duct that receives sperm from the epididymis, through the seminal vesicles and out through the ejaculatory duct into the prostate gland. Deposits into prostatic urethra.
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seminiferous tubules | tightly coiled tubules that produce spermatozoa or sperm. Testosterone is produced here.
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epididymis | long, coiled tube over 20 ft. that attaches to the overwall of each testis. Empties into the vas deferans. Route of sperm continues.
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scrotum (balls) | soft pouch of skin behind the penis between the legs. Contains testes.
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Testis | egg-shaped gland about 2 inches in length. Contains seminiferous tubules.
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