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Hip Joint (One of the most important)

one of the most important articulations in the body, and the most complete example of the ball-andsocket joint. The hip joint is made up of two bones-the acetabulum, or cuplike cavity in the os innominatum, or three bones forming one-half of the pelvis; and the head of the femur, or thigh-bone, the same provision being made here, by capsular, conical, transverse, and lateral ligaments, to secure the bone in its socket, and yet afford unlimited play to the limb; while, to guard it from blows and the force of accidents, the part is padded with a number of short, fleshy muscles, in addition to which a quantity of adipose tissue beneath the cuticle still further protects the part.