Diaphysis

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Diaphysis
Illu long bone.jpg
Gray's p.79
MeSH Diaphyses
TA A02.0.00.017
FMA FMA:24013
Anatomical terminology

The diaphysis (/dˈæfɨsɨs/[1][2]) 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'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.

Ewing's sarcoma tends to occur at the diaphysis.[3]

References[edit]

  1. ^ OED 2nd edition, 1989, as /daɪˈæfɪsɪs/.
  2. ^ Entry "diaphysis" in Merriam-Webster Online Dictionary.
  3. ^ Physical Medicine and Rehabilitation Board Review, Cuccurullo

Additional images[edit]

See also[edit]