Joint
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Joint
A joint (/dʒɔɪnt/, from Latin iunctus) is the location at which two or more bones connect. Joints are constructed to allow movement (except for skull bones) and provide mechanical support, and are classified structurally and functionally.
Structure
Structurally, joints are classified as:
- Fibrous joint: These are connected by fibrous tissue.
- Cartilaginous joint: These are connected entirely by cartilage.
- Synovial joint: These have a space, called a synovial cavity, filled with synovial fluid.
Function
Functionally, joints are classified as:
- Synarthrosis: These permit little or no mobility. Most synarthrosis joints are fibrous joints.
- Amphiarthrosis: These permit slight mobility. Most amphiarthrosis joints are cartilaginous joints.
- Diarthrosis: These permit a variety of movements. Most diarthrosis joints are synovial joints.
Related Terms
- Arthritis: Inflammation of one or more joints.
- Arthroplasty: Surgical repair of a joint.
- Arthroscopy: A minimally invasive surgical procedure on a joint.
- Bursitis: Inflammation of the bursa, a small sac filled with lubricating fluid, located between tissues such as bone, muscle, tendons, and skin.
See Also
External links
- Medical encyclopedia article on Joint
- Wikipedia's article - Joint
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