Phosphate Exchange in Marrow-Filled and Pneumatized Bones of Birds

Abstract
Uptake of radiophosphate in the 24 hours after its intravenous injection is much greater in the avian femur (marrow-filled) than in the avian humerus (‘pneumatized’). In animals in which both bones contain marrow, the work of others indicates no difference in the phosphate exchange of these bones. It is concluded that the presence of bone marrow (and perhaps only its vascularity) has a great influence on the phosphate exchange of bone.

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