part of part of contributes to morphology of small intestine jejunum BTO:0000657 CALOHA:TS-0496 EFO:0001333 EMAPA:18666 EV:0100074 FMA:7207 GAID:318 MA:0000340 MAT:0000045 MESH:A03.492.411.620.625 MIAA:0000045 NCIT:C12388 OpenCyc:Mx4rwATkPJwpEbGdrcN5Y29ycA TODO consider ZFA:0001323 mid intestine, see also small intestine 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] 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] UBERON:0002115 UMLS:C0022378 VHOG:0000053 galen:Jejunum intestinum jejunum jejunal mid-intestine middle intestine the portion of the small intestine that extends from the duodenum to the ileum uberon subdivision of digestive tract