MICROANATOMY

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 long bone in a child is divided into four regions: the diaphysis (shaft or primary ossification centre), metaphysis (where the bone flares), physis (or growth plate) and the epiphysis (secondary ossification centre).

Detailed explanation-3: -The diaphysis plays an essential role in the structural functionality, the transport of oxygen and immune support, and mineral and fat storage. The medullary cavity, housed within the diaphysis, is where blood products, including red blood cells, white blood cells, and platelets, are formed.

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.