Merck Manual

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Urethra

By

Glenn M. Preminger

, MD, Duke Comprehensive Kidney Stone Center

Medically Reviewed Apr 2022 | Modified Sep 2022
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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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