What two structures form the hip joint?

The hip joint is formed by the pelvis and the femur, making them the key structures involved in this joint. The acetabulum, which is a cup-like socket located in the pelvis, interfaces with the head of the femur to create a ball-and-socket joint. This configuration allows for a wide range of motion, including flexion, extension, abduction, adduction, and rotation. The stability of the hip joint is enhanced by the deep socket of the acetabulum and surrounding ligaments and muscles, making it a critical joint for activities such as walking, running, and jumping.

The other choices represent different joints in the body: the tibia and fibula form the ankle joint, the scapula and clavicle are part of the shoulder girdle, and the humerus and scapula connect at the shoulder joint. Each of these pairs serves different functional roles in the body’s movement and stability, but they do not form the hip joint specifically.