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Diaphysis facts for kids

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Diaphysis
Structure of a Long Bone.png
A long bone, with the diaphysis labeled at right.

The diaphysis (pl.: diaphyses) 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).

It is 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.

Ewing sarcoma tends to occur at the diaphysis.

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