Osteon
Osteon
Osteon (pronounced: /ˈɒstiɒn/), also known as Haversian system, is a fundamental functional unit of compact bone. The term "Osteon" is derived from the Greek word "osteon", which means bone.
Structure
Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the Haversian Canal. The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line.
Function
The primary role of the osteon is to provide support and protection. The structure allows the osteon to withstand stress and resist the strain of weight bearing, which prevents the bone from breaking.
Related Terms
- Haversian Canal: The central canal containing blood vessels, nerves, and lymphatic vessels within an osteon.
- Lamellae: The concentric layers of bone within an osteon.
- Cement line: The boundary of an osteon.
- Osteocyte: A cell that lies within the substance of fully formed bone.
- Canaliculi: Microscopic canals between the lacunae of ossified bone.
See Also
External links
- Medical encyclopedia article on Osteon
- Wikipedia's article - Osteon
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