ANATOMY

Detailed explanation-1: -The epiphyses, which are wider sections at each end of a long bone, are filled with spongy bone and red marrow. The epiphyseal plate, a layer of hyaline cartilage, is replaced by osseous tissue as the organ grows in length. The medullary cavity has a delicate membranous lining called the endosteum.

Detailed explanation-2: -Moving from outside the bone to inside the bone, here are the layers: Periosteum. Cortical, or Hard Bone. Cancellous, or Spongy Bone. Bone Marrow.

Detailed explanation-3: -The epiphysis is at each end of a long bone. It contains mostly spongy bone. The metaphysis is the part of a long bone between the diaphysis and the growth plate.

Detailed explanation-4: -Spongy bone is found mostly at the ends of bones and contains red marrow. Bone marrow is found in the center of most bones and has many blood vessels. There are two types of bone marrow: red and yellow. Red marrow contains blood stem cells that can become red blood cells, white blood cells, or platelets.

Detailed explanation-5: -Flat bones, like those of the cranium, consist of a layer of diploë (spongy bone), covered on either side by a layer of compact bone (Figure 6.3. 3). The two layers of compact bone and the interior spongy bone work together to protect the internal organs.