GENERAL HISTOLOGY

Detailed explanation-1: -The diaphysis is the tubular shaft that runs between the proximal and distal ends of the bone. The hollow region in the diaphysis is called the medullary cavity, which is filled with yellow marrow. The walls of the diaphysis are composed of dense and hard compact bone.

Detailed explanation-2: -Most of the diaphysis is formed by compact cortical bone, whereas the inside of the metaphysis and the epiphysis, as well as of short tubular and flat bones contains trabecular (cancellous) bone tissue.

Detailed explanation-3: -The diaphysis (shaft) of a long bone makes up most of a bone’s length. It contains mostly compact bone. The epiphysis is at each end of a long bone. It contains mostly spongy bone.

Detailed explanation-4: -What type of bone makes up the majority of the diaphysis of long bones like the humerus? Describe the layers of bone tissue found here. Most of the bone tissue of the humerus is compact bone. Compact bone is on the outside and spongy (cancellous) bone is on the inside.

Detailed explanation-5: -Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.