The hip and pelvis are two distinct but interrelated parts of your body. The pelvis is a large semicircular bone complex that forms the base on which your torso and upper body are positioned. The pelvis is built to provide a foundation of the movement of other parts of your body, particularly your back and legs. Additionally, it also permits the weight of your entire body to be evenly distributed to your legs, which are connected to the pelvis through the hip joints. The hip joint is a structure of four bones, forming a ball and socket joint between your pelvis and your femur (thigh). This joint provides you with mobility and stability for weight-bearing activities involving the legs.