part of biliary tree A complex network of conduits that begins with the canals of Hering (intralobar bile duct) and progressively merges into a system of interlobular, septal, and major ducts which then coalesce to form the extrahepatic bile ducts, which finally deliver bile to the intestine, and in some species to the gallbladder. AAO:0011020 EMAPA:35172 FMA:14665 Hollow tree organ, the organ parts of which consist of the bile ducts.[AAO] The path in many species is as follows: Bile canaliculi -> Canals of Hering (intralobar bile duct) -> interlobular bile ducts -> intrahepatic bile ducts -> left and right hepatic ducts merge to form -> common hepatic duct *exits liver* and joins -> cystic duct (from gall bladder) forming -> common bile duct -> joins with pancreatic duct -> forming ampulla of Vater -> enters duodenum [WP] UMLS:C0005423 XAO:0000455 biliary tract biliary system organ system subdivision