diaphysis meaning
Diaphysis. The diaphysis is the main or midsection of a long bone. It is made up of cortical bone and usually contains bone marrow and adipose tissue. It's a middle tubular part composed of compact bone which surrounds a central marrow cavity which contains red or yellow marrow.In diaphysis, primary ossification occurs.iaphysis. The diaphysis is the main or midsection of a long bone. It is made up of cortical bone and usually contains bone marrow and adipose tissue. It's a middle tubular part composed of compact bone which surrounds a central marrow cavity which contains red or yellow marrow.