Joints

Summarized by Plex Health
Last Updated: 09 May 2022

A joint is the part of the body where 2 or more bones meet to enable movement. Every bone in the body, besides the hyoid bone in the throat, meets at least another bone at a joint. The shape of a joint depends on its function. Generally speaking, the more movement that is feasible via a joint, the higher the risk of injury. The joints of the head are called sutures. The 6 types of freely movable joint consist of: Ball and socket joint, the spherical head of one bone sits within the mug of another, such as the hip joint or shoulder joint. Hinge joint, the two bones close and open in one direction only like a door, such as the knee and arm joint joints. Pivot joint, one bone swivels around the ring formed by another bone, such as the joint in between the first and second vertebrae in the neck.

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