Day 2 8.31.09 Male Reproductive Anatomy

Day 2 8.31.09 Male Reproductive Anatomy - Ampulla/bladder...

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8.31.2009 Male Reproductive Anatomy Scrotum: Testes -temperature regulation, keeps the testes cooler (6-9 degrees lower than regular body temp) -whales do not have a scrotum, same with bull elephants. Its arteries and veins have an extensive network that keeps it cooler - Seminiferous tubules : located in testes. Where sperm are produced - rete testis (see pic): collecting duct for seminiferous tubules -FSH: in male stimulates Sperm are made in seminiferous tubules, go through testes and into epididymis. As sperm come out of the testicle they first migrate into the epididymis. Epididymis: Head (ceput) Body (corpus) Tail (cauda): sperm undergo final maturational development
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-in the last part of the epididymis, the sperm reside in the tail. Cytoplasmic droplets will stay if sperm are not given a long enough time to reside in the tail. -cytoplasmic droplets: subfertile sperm Vas Deferens - From tail of epdidymis, sperm go through vas deferens. The vas deferens goes out of the tail of the epididymis and eventually connects with the urethra or urogenital tract, where the bladder is.
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Unformatted text preview: Ampulla/bladder- also contributes some fluid to the ejaculate. The ampulla is actually part of the vas deferens. Urethra- male uses the urethra to ejaculate out of-sperm are in the urethra until they leave the body The sperm is transferred from the vas deferens into the urethra, collecting secretions from the male accessory sex glands such as the seminal vesicles, prostate gland and the cowpers, which form the bulk of semen. (After the urethra): There are 3 accesory sex glands:-listed in order of which sperm will see them: 1. Seminal Vesicles 2. Prostate 3. Cowpers-these three contribute the fluid portion of the semen *These 3 compose 90% of value of semen-males are still fertile if there seminal vesicles are removed. -sperm HAVE to get out of seminal fluid to be able to fertilize the egg-seminal vesicles of a boar are a lot larger. They leave about 250cc of ejaculate and take longer to ejaculate....
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Day 2 8.31.09 Male Reproductive Anatomy - Ampulla/bladder...

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