Males {male reproductive organs} have testis, seminiferous tubule, interstitial cell, epididymis, vas deferens, inguinal canal, prostate gland, and penis.
sperm and seminal fluid {semen}|.
Skin sacs {scrotum}| hold testes.
male gonads {testis, organ}|.
Testis makes sperm in tubules {seminiferous tubule}.
Testis makes hormones in cells {interstitial cell}.
Sperm pass into tubes {epididymis} for storage.
Tubes {vas deferens}| go through inguinal canal, over bladder, to urethra top.
Vas deferens goes through connective-tissue passageways between leg and pelvis {inguinal canal}|, over bladder, to urethra top.
At urethra, a gland {prostate gland}| {seminal vesicle} makes fluid and secretes it into vas deferens.
Urethra leads into fleshy organ {penis}|, which has erectile tissue.
bull penis {pizzle}.
Penis has three spongy-tissue {erectile tissue} columns that can fill with blood to become hard.
Glands {Cowper's gland} {Cowper gland} can secrete into urethra.
In males, penis tip {glans}| has orgasm.
Testes make small cells {sperm}| with nuclei and tails and many mitochondria. Male potency peaks in late adolescence. Sertoli cells kill bad sperm.
Fish spread sperm {milt}| over laid eggs.
Male germ cells develop to make spherical cells {spermatid} {spermatogenesis}. Spermatids mature into sperm having head with cell nucleus, neck with mitochondria for energy, and tail.
Spermatids mature into sperm, with enzyme pouches {acrosome} at tips. Acrosomes break corona radiata.
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Date Modified: 2022.0225