Diaphyseal
Diaphyseal
Diaphyseal (pronounced: /daɪəˈfɪziəl/) is a term used in anatomy and medicine to refer to the main or mid section (shaft) of a long bone. The term is derived from the Greek words 'dia' meaning 'through' and 'physis' meaning 'nature'.
Structure
The diaphysis of a long bone, such as the femur or humerus, is the tubular, middle part of the bone. It is made up of a thick layer of compact bone known as cortical bone, which surrounds a central marrow cavity. This cavity contains the bone marrow, which is responsible for the production of blood cells.
Function
The primary function of the diaphysis is to support weight and withstand torsional forces. It is also responsible for the leverage which is necessary for movement. The diaphysis also serves as a site for muscle attachment.
Related Terms
- Epiphysis: The end part of a long bone, initially growing separately from the shaft.
- Metaphysis: The narrow portion of a long bone between the epiphysis and the diaphysis.
- Periosteum: A dense layer of vascular connective tissue enveloping the bones except at the surfaces of the joints.
- Endosteum: A thin vascular membrane of connective tissue that lines the inner surface of the bony tissue that forms the medullary cavity of long bones.
See Also
External links
- Medical encyclopedia article on Diaphyseal
- Wikipedia's article - Diaphyseal
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