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Q4. Answer the following:

(a) What is a ball and socket joint?

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A ball and socket joint is a type of synovial joint, such as the hip and shoulder joints. In this type of joint, one bone has a smooth, ball-shaped head that fits into a cuplike socket on the other end. In the hip, the head of the femur has a hemispherical shape that fits in the cuplike socket of the acetabulum of the pelvis. This type of joint is one of the most moveable joints in the body.

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Pankaj Sanodiya

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