Bones and Joints

The four bones of the shoulder: Together these four bones form four junctions, or joints:
Cartilage

There are two types of cartilage in the shoulder: Ligaments

The shoulder relies heavily on ligaments for support. Ligaments attach bone to bone and provide the "static" stability in a joint. Ligaments keep the joint within the normal limits of movement. Muscles and Tendons

Muscles and tendons work together in the shoulder to provide the "dynamic" stability of the shoulder.

There are four muscle groups in the shoulder: Bursae

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