Prostate cancer is diagnosed and treated by the Urology Division of Premier Medical Group. The function of the prostate is to store and secrete a slightly alkaline fluid, milky or white in appearance, that constitutes about 25-30% of the volume of the semen. The alkalinity of semen helps neutralize the acidity of the vaginal tract, prolonging the lifespan of sperm.
The prostate also contains some smooth muscles that help expel semen during ejaculation.
Another important prostate function is controlling the flow of urine during ejaculation. A complex system of valves in the prostate sends the semen into the urethra during ejaculatory process and a prostate muscle called the sphincter seals the bladder, thereby preventing urine entry into the urethra.