The skeletal system protects, supports and stores minerals. The bones of the body are living organs made up of cells, minerals and protein fibers. The typical bone has an outer layer of compact bone, an inner layer of spongy bone and bone marrow inside that.
The skeletal system consists of all bones in the body, ligaments, cartilage and tendons. Even the teeth are considered to be part of the skeletal system, but they are not considered to be bones. A human baby is born with 300 individual bones that join together as he ages to form a total of 206 bones.