ileum http://upload.wikimedia.org/wikipedia/commons/3/3d/Illu_small_intestine.jpg GAID:315 AAO:0010403 UBERON:0002116 MIAA:0000282 OpenCyc:Mx4rvdcLHZwpEbGdrcN5Y29ycA intestinum ileum MESH:A03.492.411.620.484 CALOHA:TS-0472 EV:0100075 ileal uberon The portion of the small intestine that extends from the jejunum to the colon. EFO:0001334 TODO consider ZFA:0000706 posterior intestine, see also colon galen:Ileum posterior intestine UMLS:C0020885 NCIT:C12387 lower intestine MA:0000339 VHOG:0000647 XAO:0000237 BTO:0000620 EMAPA:32764 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] distal intestine FMA:7208 The ileum is the final section of the small intestine in most higher vertebrates, including mammals, reptiles, and birds. In fish, the divisions of the small intestine are not as clear and the terms posterior intestine or distal intestine may be used instead of ileum.[Wikipedia:Ileum] MAT:0000282 subdivision of digestive tract