human_reference_atlas Homo sapiens ulna http://upload.wikimedia.org/wikipedia/commons/6/67/Illu_upper_extremity.jpg GAID:188 AS Wikipedia:Ulna ulna NCIT:C12809 UBERON:0001424 uberon UMLS:C0041600 SCTID:181948009 ulnar MESH:D014457 ulna MA:0001358 AAO:0000789 The major postaxial endochondral bone in the anterior zeugopod[Phenoscape]. One of the two long bones of endochondral origin of the fore-epipodium; it is located on the medial (inner) side of the radius. The upper end of the ulna articulates with the lower end of the humerus forming a strong hinge joint with the carpals, whereas the lower articulates with the carpals.[AAO] The corresponding bone in the posterior fin/limb is the fibula. FMA:23466 EMAPA:19104 galen:Ulna VSAO:0005013 long bone endochondral element free part of arm bone