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|Noun||1.||os longum - in limbs of vertebrate animals: a long cylindrical bone that contains marrow|
endosteum - vascular membrane that lines the inner surface of long bones
epiphysis - the end of a long bone; initially separated from the main bone by a layer of cartilage that eventually ossifies so the parts become fused
metaphysis - the growing part of a long bone between the diaphysis and the epiphysis
arm bone - a bone in the arm
leg bone - a bone of the leg
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