part of part of contributes to morphology of bone element appendicular skeleton long bone BTO:0004256 EMAPA:35503 Endochondral_ossification is an essential process during the rudimentary formation of long bones, with the exception of the clavicle[Wikipedia:Endochondral_ossification]. The medial and and lateral ends undergo EO, the mid-portion is formed by a process with features of EO & IO (the process is shared by the mandible)[ISBN:9780397517251] FMA:7474 Long bone is a limb bone that is subcylindrical and has a shaft with periosteum separating the ends of the bones. Long bones are present only in the limbs[VSAO:wd]. MA:0002802 OpenCyc:Mx4rv6axr5wpEbGdrcN5Y29ycA UBERON:0002495 UMLS:C0222647 galen:LongBone os longum uberon