December 5, 2001

Urethral sphincter mechanism


The segment of the urethra that influences storage and emptying of urine in the bladder. Acts like a valve that controls bladder emptying and urination by tightening to close off the flow or urine or by relaxing, which opens the outlet from the bladder, allowing urine to flow from the bladder to the outside of the body.

Tags: Cancer Dictionary, U, Uncategorized