Anatomy
urethral sphincter
Definitions related to urethral sphincters:
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One or both of the muscles that surround the urethra and contract to control the flow of urine, either involuntarily (the internal sphincter) or voluntarily (the external sphincter).NCI ThesaurusU.S. National Cancer Institute, 2021
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Muscles that control the release of urine to the urethra. They consist of the internal and external urinary sphincters.NLM Medical Subject HeadingsU.S. National Library of Medicine, 2021
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