Hip joint, the longest bone in the body, is made up of innominate bone in the femur and pelvis. It is the largest joint in the body. Spheroid joints have high degrees of freedom, but the muscles that make up joints are so numerous that some muscles work together.
The pelvis is the upper body's axis, with the hip joint at the junction with the lower leg.
Hip joint is a joint with a large range of motion that supports various movements, such as standing, walking, jumping, doing, and touching, but is greatly influenced by its centrifugal and gravitational forces.