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femur

^ http://purl.obolibrary.org/obo/XAO_0003214


Either of the paired, elongate, cylindrical bones of endochondral origin that form the thighs, extending from the pelvic girdles to the knees. Proximal bone of the hind leg, which begins to ossify at NF stage 55. [ https://www.worldcat.org/search?q=bn%3A0471209627 ]