(anatomy) A muscular valve that controls the flow of digestive juices (bile and pancreatic juice) through the ampulla of Vater into the second part of the duodenum.

plural of sphincter of Oddi

plural of urethral sphincter

(anatomy) The sphincter situated at the upper part of the esophagus.

(anatomy) The sphincter situated at the lower part of the esophagus.

plural of lower esophageal sphincter

plural of upper esophageal sphincter