Letter A

Arthrosis

>Gliding -- one bony surface glides on another without angular or rotatory movement; >Angular -- occurs only between long bones, increasing or decreasing the angle between the bones; >Circumduction -- occurs in joints composed of the head of a bone and an articular cavity, the long bone describing a series of circles, the whole forming a cone; and >Rotation -- a bone moves about a central axis without moving from this axis.</LI></UL> The word 'arthrosis' comes from a Greek root, 'arthros' meaning a joint (as in arthritis, inflammation of a joint).

The word 'joint' itself comes from a Latin root, 'junctio' meaning a joining (as in a junction).

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