The diaphysis (: diaphyses) is the main or midsection (shaft) of a
long bone
The long bones are those that are longer than they are wide. They are one of five types of bones: long, short, flat, irregular and sesamoid. Long bones, especially the femur and tibia, are subjected to most of the load during daily activities ...
. It is made up of
cortical bone and usually contains
bone marrow and
adipose
Adipose tissue (also known as body fat or simply fat) is a loose connective tissue composed mostly of adipocytes. It also contains the stromal vascular fraction (SVF) of cells including preadipocytes, fibroblasts, Blood vessel, vascular endothel ...
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
Ossification (also called osteogenesis or bone mineralization) in bone remodeling is the process of laying down new bone material by cells named osteoblasts. It is synonymous with bone tissue formation. There are two processes resulting in t ...
occurs.
Ewing sarcoma tends to occur at the diaphysis.
[Physical Medicine and Rehabilitation Board Review, Cuccurullo]
Additional images
Illu long bone.jpg
File:EpiMetaDiaphyse.jpg, Long bone
See also
*
Epiphysis
*
Metaphysis
References
Long bones
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