The ball and socket joint is a joint in which a ball-shaped surface of a bone is fitted into a cup-like indentation of another bone. It can move in 360 degrees. It is found between:

• The humerus and Pectoral girdle (Shoulder Joint).

• Femur and Acetabulum of Pelvic girdle (Hip Joint).

There are four ball and socket joints present in the human body.

• Two shoulder joints and two hip joints.