The skeletal system is made up of 206 bones. It also includes cartilage, tendons and ligaments. There are two, primary divisions of the skeletal system: the axial skeleton and the appendicular skeleton. The primary purpose of the human skeletal system is to provide locomotion, support and protection for the body. Vital organs, such as the brain, heart, and lungs, are protected by the skeletal system. In addition to locomotion, support, and protection, the skeletal system also produces red blood cells, and stores important minerals for the body.