Osteocyte
Osteocyte
Osteocyte (pronounced: os·te·o·cyte, /ˌɒstɪəʊˈsaɪt/) is a type of bone cell that is essential for maintaining bone tissue. The term originates from the Greek words 'osteon' meaning bone and 'kytos' meaning cell.
Function
Osteocytes are the most abundant cell type in bone. They are derived from osteoblasts, cells that secrete the matrix for bone formation. Once the osteoblasts are entrapped in the matrix, they become osteocytes. Osteocytes have long, hair-like extensions that allow them to communicate with other osteocytes and with cells on the bone surface. They play a crucial role in bone remodeling by sensing mechanical stress and sending signals to osteoclasts and osteoblasts.
Structure
Osteocytes are located within spaces called lacunae in the bone matrix. They have a stellate shape, with long processes extending in canals called canaliculi. These processes allow the osteocytes to communicate with each other and with cells on the bone surface.
Related Terms
- Osteoblast: A cell that secretes the matrix for bone formation.
- Osteoclast: A type of bone cell that breaks down bone tissue.
- Lacunae: Small cavities that contain osteocytes in bone or cartilage tissue.
- Canaliculi: Small channels or canals in bone or other tissue.
External links
- Medical encyclopedia article on Osteocyte
- Wikipedia's article - Osteocyte
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