Prostate

Skip Navigation
Location of prostate below bladder and next to rectum, showing urethra passing through prostate.

The prostate is part of the male reproductive system. It's a small, walnut-shaped organ that produces most of the fluid in semen. It lies just below the bladder. It surrounds the urethra, the tube that carries urine through the penis and out of the body.

Current as of: June 16, 2022

Author: Healthwise Staff
Medical Review:
E. Gregory Thompson MD - Internal Medicine
Kathleen Romito MD - Family Medicine
Christopher G. Wood MD, FACS - Urology, Oncology
William H. Blahd Jr. MD, FACEP - Emergency Medicine




The Health Encyclopedia contains general health information. Not all treatments or services described are covered benefits for Kaiser Permanente members or offered as services by Kaiser Permanente. For a list of covered benefits, please refer to your Evidence of Coverage or Summary Plan Description. For recommended treatments, please consult with your health care provider.