jejunum http://upload.wikimedia.org/wikipedia/commons/3/3d/Illu_small_intestine.jpg MESH:A03.492.411.620.625 NCIT:C12388 The first two fifth of the small intestine beyond the duodenum. It extends from the end of the duodenum to the ileum. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG] TODO consider ZFA:0001323 mid intestine, see also small intestine CALOHA:TS-0496 galen:Jejunum MAT:0000045 MA:0000340 UMLS:C0022378 FMA:7207 middle intestine MIAA:0000045 BTO:0000657 The jejunum is the middle 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 middle intestine or mid-gut may be used instead of jejunum.[Wikipedia:Jejunum] intestinum jejunum GAID:318 jejunal OpenCyc:Mx4rwATkPJwpEbGdrcN5Y29ycA VHOG:0000053 UBERON:0002115 EFO:0001333 uberon EMAPA:18666 mid-intestine The portion of the small intestine that extends from the duodenum to the ileum. EV:0100074 subdivision of digestive tract