Support Bones provide a framework that supports the body and cradles its soft organs
Protection The fused bones of the skull protect the brain. The vertebrae surround the spinal cord, and the rib cage helps protect the vital organs of the thorax.
Movement Skeletal muscles, which attach to bones by tendons, use bones as levers to move the body and its parts. The design of joints determine the types of movement possible.
Mineral and Growth factor storage Bone is a reservoir for minerals, more importantly calcium and phosphate. the store minerals are released into the bloodstream as needed for distribution to all parts of the body.
Blood cell formation Most blood cell formation occurs in the marrow of certain bones.