Merck Manual

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Urethra

By

Glenn M. Preminger

, MD, Duke Comprehensive Kidney Stone Center

Last full review/revision Jun 2019| Content last modified Jun 2019
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The urethra is a tube that drains urine from the bladder Bladder The bladder is an expandable, muscular sac. Urine accumulates in the bladder as it arrives from the ureters. The bladder gradually increases in size to accommodate an increasing volume of urine... read more out of the body. In men, the urethra is about 8 inches (20 centimeters) long, ending at the tip of the penis. In women, the urethra is about 1½ inches (4 centimeters) long, ending at the vulva (the area of the external female genital organs).

Urethra in the Male

Male Reproductive Organs
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Test your knowledge

Urethritis
Urethritis is an infection of the urethra, the tube that transports urine out of the body from the bladder. Many organisms can cause urethritis. Which of the following is an organism that commonly causes urethritis in men, but is more likely to infect reproductive organs in women?  
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