has part has part contributes to morphology of stomach pyloric antrum pylorus 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.[uncertain][VHOG] BTO:0001146 EHDAA2:0001580 EHDAA:4860 EMAPA:17631 FMA:14581 GAID:333 MA:0002560 MESH:A03.492.766.799 The orifice which allows the passage from the stomach into the intestine. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG] UBERON:0001166 UMLS:C0034196 VHOG:0000420 We follow Kardong in defining stomach regions by glands galen:Pylorus pars pylorica pars pylorica gastricae pyloric pyloric part of stomach pyloric region stomach pyloric region the stomach tissue region surrounding and controlling the distal outlet of the stomach, which opens into the duodenum uberon valvula pylori pyloric canal pyloric gastric gland zone of stomach