part of part of in lateral side of develops from develops from contributes to morphology of composed primarily of innominate bone ischium http://upload.wikimedia.org/wikipedia/commons/2/29/Illu_pelvic_girdle.jpg https://cdn.humanatlas.io/digital-objects/ref-organ/pelvis-female/v1.3/assets/3d-vh-f-pelvis.glb https://cdn.humanatlas.io/digital-objects/ref-organ/pelvis-male/v1.3/assets/3d-vh-m-pelvis.glb ischial bone VSAO:0005006 EMAPA:18727 Wikipedia:Ischium galen:Ischium MESH:D007512 AAO:0000860 NCIT:C32884 os ischii FMA:16592 ischial MA:0001337 UMLS:C0022122 ischium bone this is_a hip bone in MA; in FMA it is a zone of bone organ. SCTID:182025004 UBERON:0001274 GAID:208 Paired bones of endochondral origin that constitute the posterior elements of the pelvic girdle. They are synostotically fused to each other and form the posterior part of the acetabulum.[AAO] Endochondral bone that is paired, forming the posterior part of the pelvis, articulating with the pubis and ilium. bone tissue endochondral bone ischial cartilage element pelvic girdle bone/zone pelvic girdle skeleton bone of hip region ischial endochondral element lateral structure