part_of part of is part of part of Homo sapiens endoderm-derived structure sphincter muscle hepatopancreatic ampulla sphincter of hepatopancreatic ampulla http://upload.wikimedia.org/wikipedia/commons/4/43/Gray1057.png sphincter of ampulla of vater Oddi's sphincter EMAPA:18663 UMLS:C0028872 UBERON:0004915 GAID:285 musculus sphincter ampullae hepatopancreatica FMA:15077 sphincter of Oddi uberon MESH:D009803 NCIT:C13065 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. Relaxed by the hormone Cholecystokinin (CCK) via vasoactive intestinal polypeptide (VIP).[WP]. musculus sphincter ampullae hepatopancreatic ampullary sphincter gastrointestinal sphincter