Learn about the hip joint 's anatomy and functions, including its bones, ligaments, capsule, labrum, angles, and range of motion. The hip joint is a ball-and-socket joint that enables multiple movements and weight-bearing activities. Explore hip bone anatomy with parts, names, functions & labeled diagrams. Learn structure & role of hip bones in movement, support & protection. Learn about the hip joint , a ball-and-socket joint formed by the acetabulum of the pelvis and the femoral head of the thigh bone. The hip joint allows for a wide range of movement and stability in the lower body and is prone to various types of pain and disorders. The hip joint is a ball and socket type of synovial joint that connects the pelvic girdle to the lower limb. In this joint, the head of the femur articulates with the acetabulum of the pelvic (hip) bone.