Support and shape - Skeleton provides a definite framework to soft parts and gives a definite shape.
Protection - The delicate organs are well protected by bone casing. For example, the skull provides protection to the delicate brain, and the rib cage protects the heart and lungs.
Blood cells formation - Blood cells such as RBCs and WBCs are formed in the marrow of certain long bones.
Movement – The bones connected to one another allow movements by the action of muscles that originate on one bone and are inserted into another.
Storehouse of Calcium and Phosphorus - Bones store phosphorus and calcium for the entire body.