Vas deferens

The vas deferens is a narrow, muscular tube that connects the testicles (where sperm is produced) to the urethra. During ejaculation, the sperm flows out of the testicles, through the vas deferens, and into the tube (urethra) that leads outside the body through the penis.

Several glands, such as the prostate gland, add fluid to the sperm along the way.

Last Updated: May 22, 2008

Author: Bets Davis, MFA

Medical Review: Joy Melnikow, MD, MPH - Family Medicine & Kirtly Jones, MD - Obstetrics and Gynecology

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