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The prostate gland is a small, walnut-shaped organ that lies just below a man's bladder. It surrounds the urethra, the tube that carries urine from the bladder out of the body through the penis.
The prostate gland produces most of the fluid in semen.
December 3, 2011
E. Gregory Thompson, MD - Internal Medicine & J. Curtis Nickel, MD, FRCSC - Urology
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