The acetabulum is shaped developmentally by three bones
namely ilium, ischium, and pubis. As associated with the glenoid cavity of the
scapula, it is focused inferiorly other than laterally and anteriorly, is
deeper, and is not enclosed wholly by the articular cartilage (but solitary on
a lunate surface). The hip joint is become constant primarily by its capsule
and ligaments, the shoulder joint by the musculotendinous cuff.
