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Which bones form the ball-and-socket joint of the hip?

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The human hip and pelvis — ball-and-socket joint Anterior view of the hip and pelvis, showing attachment of ligaments to the femur, ilium, ischium, and pubis.

The ball-and-socket joint of the hip is formed by the femur and the pelvis. Specifically, the rounded head of the femur fits into a cavity in the pelvis called the acetabulum. This type of joint allows for a wide range of motion, including swinging and spinning of the leg.12345