A urinary sphincter,located at each end of the urethra,controls the flow of urine.

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The urinary sphincter is a circular muscle that surrounds the urethra and acts as a valve to control the flow of urine from the bladder. There are two urinary sphincters: the internal urethral sphincter, which is made of smooth muscle and is under involuntary control, and the external urethral sphincter, which is made of skeletal muscle and is under voluntary control. Both sphincters work together to regulate the flow of urine.

A Urinary Sphincter,located at Each End of the Urethra,controls the Flow