What Is Prostate?
The prostate—one of the components of a man's sex organs—is a walnut-sized gland in young men. But with age, the prostate slowly increases in size, and this can cause problems. For men, the older you get, the more likely you are to have problems with your prostate gland.
The prostate is wrapped around the urethra, which is the tube that carries urine out of the body when you urinate. In men, the urethra also carries semen, the fluid that contains sperm, out of the body during ejaculation. The prostate adds special fluids to the semen when a man ejaculates, and muscles in the prostate gland contract to force the semen out of the body.