The human hip is the location where the pelvis connects with the thigh bone. This forms a hip joint that is made up of two sections called the femoral head and acetabulum. These are symmetrical weight-bearing joints that are important parts of the body because they facilitate activities, such as walking and running.
The femoral head is a bone that has a ball shape and is at the top of the femur or thigh bone. The acetabulum is a cup-like structure that acts as a socket for the femoral head. The ball fits into the socket. The surface of the femoral head and acetabulum have layers of hyaline cartilage that act as cushions for the ends of these bones so that there is smooth movement.
Additionally, ligaments and strong muscles also surround the femoral head and acetabulum. The ligaments link together the ball and socket of the hip joint to form the joint capsule. This capsule contains membranes called synovial membranes that releases synovial fluid to lubricate these joints.