The shoulder is a ____ joint formed by the humerus where it inserts in the glenoid fossa of the scapula.

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The shoulder joint is a ball-and-socket joint, which allows for a wide range of motion in multiple directions. The head of the humerus fits into the shallow socket (glenoid fossa) of the scapula, allowing for flexibility and mobility in the shoulder. Saddle joints are found in the thumb, fibrous joints are immovable joints such as sutures in the skull, and hinge joints move in one plane of motion like the elbow.

The Shoulder Is a ____ Joint Formed by the Humerus