Composed primarily of a non-living matrix of calcium salts and a living matrix of collagen fibers, bone is the major component that makes up the human skeleton.
The elbow is comprised of three bones, the humerus, radius, and ulna. The wrist and hand are much more complex, but they can be broken down into five component groups, the radius, ulna, carpals, metacarpals, and phalanges.
The hip joint provides the body with stability for weight-bearing activities involving the legs. The knee joint functions as a hinge in the creation of all motion in the legs.
The skeletal system is the framework of hard, articulated structures that provides physical support, attachment for muscles, and protection of vital structures in the human body.
