obsolete_jejunum true MAT:0000045 FMA:7207 true http://purl.obolibrary.org/obo/UBERON_0002115 SAEL:56 The section of the small intestine that comprises the first two fifths beyond the duodenum and that is larger, thicker-walled, and more vascular and has more circular folds than the ileum. EV:0100074 James Malone intestinum jejunum NCIt:C12388 BTO:0000657 Use http://purl.obolibrary.org/obo/UBERON_0002115 label: jejunum middle intestine mid intestine The portion of the small intestine that extends from the duodenum to the ileum. 2.38 MA:0000340