ANATOMY

Detailed explanation-1: -The diaphysis is the main or midsection (shaft) of a long bone. It is made up of cortical bone and usually contains bone marrow and adipose tissue (fat).

Detailed explanation-2: -The shaft of a long bone is called the diaphysis.

Detailed explanation-3: -A long bone has two main regions: the diaphysis and the epiphysis (Figure 6.3. 1). The diaphysis is the hollow, tubular shaft that runs between the proximal and distal ends of the bone. Inside the diaphysis is the medullary cavity, which is filled with yellow bone marrow in an adult.

Detailed explanation-4: -The epiphysis is the expanded or rounded end portion of a long bone. It has red bone marrow-producing erythrocytes. The diaphysis is the shaft portion of a long bone with cortical tissue. It has bone marrow and adipose tissue.