physiological sphincter

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Related to physiological sphincter: lower esophageal sphincter, cardiac sphincter
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Noun1.physiological sphincter - a sphincter that is not recognizable at autopsy because its resting arrangement cannot be distinguished from adjacent tissue
anatomical sphincter, sphincter, sphincter muscle - a ring of muscle that contracts to close an opening
cardiac sphincter - the valve between the distal end of the esophagus and the stomach; the physiological sphincter at the esophagogastric junction
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