Prostate Gland — How it Works

Not all of the prostate's functions are known. However, one of its main roles is to provide part of the fluid necessary for ejaculation. This milky-white fluid in semen provides nutrients to the sperm so that they can survive long enough to fertilize an ovum.

The prostate is not part of the urinary system, but because it surrounds the urethra and sits directly below the bladder, it can cause urinary problems. That's why your primary doctor will often refer you to a urologist, a physician who specializes in the urinary system and male reproductive system, to see when you are experiencing prostate problems or prostate disease symptoms.