Overview of the Male Reproductive System
Accessory glands add secretions to the semen. A pair of seminal vesicles contribute about 60% of the total volume of the semen, a thick, yellowish, alkaline fluid. Semen contains sugar fructose, which provides most of the energy used by the sperm.
The prostate gland secretes its products directly into the urethra through several small ducts. This fluid is thin and milky, and contains anticoagulant enzymes and citrate, a sperm nutrient.
The bulbourethral glands, also called the Cowper’s glands, secrete a clear mucus that neutralizes any acidic urine remaining in the urethra before ejaculation.
Keywords: Bulbourethral gland | Cowper’s gland | accessory glands | male | prostate gland | reproductive system | semen | seminal vesical | sperm
- Campbell, N.A., and Reece, J.B. (2002). Biology, 6th Edition. San Francisco, CA: Pearson Benjamin Cummings.
- Clark, Joe O.E. (1999). A Visual Guide to the Human Body. London: Barnes and Noble, Inc.
- Illustration B0002406 © Wellcome Photo Library, Wellcome Images CC-BY-NC-ND 4.0.
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