The prostate gland is an organ that surrounds the urinary urethra in men. It secretes fluid that mixes with the sperm to make semen.
Reviewed last on: 9/7/2008
Louis S. Liou, MD, PhD, Assistant Professor of Urology, Department of Surgery, Boston University School of Medicine. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.