Question

multiple select question select all that apply red bone marrow is found: vertebrae of adults skull of adults spongy bone periosteum shaft of long bones in adults medullary cavities of long bones in infants

Explanation:

Red bone marrow is found in spongy (cancellous) bone. In adults, it is present in the vertebrae, skull, ribs, sternum, and the proximal ends of long bones. In infants, the medullary cavities of long bones contain red bone marrow, which later gets replaced by yellow bone marrow in adults. The periosteum is the outer - covering of bone and does not contain red bone marrow. The shaft of long bones in adults mainly has yellow bone marrow.

Answer:

vertebrae of adults, skull of adults, spongy bone, medullary cavities of long bones in infants