Diaphysis

Definition

The diaphysis is the main or central shaft portion of a long bone, typically containing the medullary cavity filled with yellow marrow. It is primarily made of compact bone that provides strength and support to the skeletal structure.

Related terms

Compact Bone:

A dense layer of bone tissue that makes up the outer layer of bones, providing strength and durability.

Medullary Cavity:

The central cavity of bone shafts where red or yellow marrow is stored, involved in blood cell production and fat storage.

Epiphysis:

The rounded end part of a long bone, at its joint with adjacent bone(s), composed mostly of spongy bone covered by compact bone