Diaphysis
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).
| Diaphysis | |
|---|---|
A long bone, with the diaphysis labeled at right. | |
| Details | |
| Pronunciation | /daɪˈæfɪsɪs/ dy-AF-iss-iss |
| Part of | Long bones |
| Identifiers | |
| MeSH | D018483 |
| TA98 | A02.0.00.017 |
| TA2 | 391 |
| FMA | 24013 |
| Anatomical terminology | |
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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