The Probert Encyclopaedia of Medicine

HIP

In medicine, the hip is the ball-and-socket joint between the head of the femur (which is ball-shaped) and the side of the pelvis (which is a cup-shaped receptor called an acetabulum). The sides of the pelvis where the femurs connect, the hips, face outwards and are tilted slightly downwards and backwards to enable the thrust required for walking. The hip is surrounded by the powerful muscles of the buttocks and thighs and is reinforced by strong ligaments, making it a very stable joint, difficult to dislocate.
Research Hip