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Rotation
A joint that permits movement. Such as shoulder, hip, elbow, knee.
ball-and-socket joint
the shoulder
The shoulder is a single joint, your question makes no sense.
The shoulder joint is a ball and socket joint. The joints between the skull plates are fused joints (no movement).
abcd or e
the shoulder joint
that would be the shoulder
Rotation
Ball-and-socket joint--shoulder and hip, for example. They come closest to a 360-degree range of movement.
It is a triangular muscle covering the shoulder joint, it raises the arm from the side of the body