Computer-generated image of the human bone structure and anatomy muscles and organs. Human skeleton video showing the organs and muscles of a tennis player during a forehand stroke. The average adult human skeleton has around 206 bones. These bones meet at joints, the majority of which are freely movable. The human skeleton also contains cartilage for elasticity. Ligaments are strong strips of fibrous connective tissue that hold bones together at joints, thereby stabilizing the skeleton during movement.