The acetabulum is a concave, cup-shaped structure on the lateral aspect of the pelvis. It forms part of the hip joint, articulating with the head of the femur. Together, they create a ball-and-socket joint that allows for a wide range of motion, including flexion, extension, abduction, adduction, internal rotation, and external rotation. The acetabulum is a concave, cup-shaped structure located on the lateral side of the pelvis. It is formed by the fusion of three pelvic bones: the ilium, ischiu