sphincter muscle
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Noun | 1. | sphincter muscle - a ring of muscle that contracts to close an opening physiological sphincter - a sphincter that is not recognizable at autopsy because its resting arrangement cannot be distinguished from adjacent tissue musculus sphincter urethrae, urethral sphincter - a striated sphincter muscle that constricts the urethra bladder sphincter, musculus sphincter vesicae - the sphincter muscle of the urinary bladder; made up of a thickened muscular layer of bladder around the urethral opening musculus sphincter ductus choledochi - the smooth muscle sphincter of the common bile duct musculus sphincter ductus pancreatici - the smooth muscle sphincter of the main pancreatic duct musculus sphincter pupillae, pupillary sphincter - a ring of smooth muscle surrounding the iris musculus sphincter pylori, pyloric sphincter, pyloric valve - the sphincter muscle of the pylorus that separates the stomach from the duodenum |
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