foregut http://upload.wikimedia.org/wikipedia/commons/9/9a/Gray27.png FMA:45616 BILA:0000085 FBbt:00005379 The bilaterian gut is typically a complete tube that opens to the exterior at both ends. It consists of mouth, foregut, midgut, hindgut, and anus (reference 1); Although all vertebrates have a digestive tract and accessory glands, various parts of this system are not necessarily homologous, analogous, or even present in all species. Therefore, broad comparisons can be best made under the listings of headgut, foregut, midgut, pancreas and biliary system, hindgut (reference 2).[well established][VHOG] EMAPA:16548 EHDAA:520 proenteron MA:0001526 The anterior portion of the primitive digestive tube of the embryo that lies cephalic to the junction of the yolk stalk, consists of endodermal tissue, and gives rise to the the pharynx, lower respiratory system, esophagus, stomach, duodenum proximal to the biliary tract, liver, pancreas, biliary tract, and gall bladder. Wikipedia:Foregut XAO:0000232 uberon NCIT:C34180 EHDAA2:0000557 praeenteron BTO:0000507 UMLS:C0231051 TGMA:0001014 Note we define this generically to include invertebrates (partly for consistency with GO), but the class may be split in future. In vertebrates the term may refer to a developmental structure AAO:0011042 UBERON:0001041 SCTID:361409009 VHOG:0000285 Anterior subdivision of a digestive tract. subdivision of digestive tract