What are four main functions of the skeletal system?

1. Protects some major organs from injury eg. Heart.
2. Provides a framework that supports the body.
3. Provides and Protects red bone marrow.
4. Provides a storage site for excess Calcium.

Another way is blood factory,gives body structure to protect orgins,mineral organs and mineral warehouse
movement potection posture Blood cells are formed inside the bonescalled red marrow