muscle, musculus - one of the contractile organs of the body

physiological sphincter - a sphincter that is not recognizable at autopsy because its resting arrangement cannot be distinguished from adjacent tissue

anal sphincter, musculus sphincter ani, sphincter ani - the sphincter muscle of the anus

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