A mammalian skeleton has many functions such as for support, protection, locomotion, production and storage.
For support
The skeleton provides a rigid framework for the body, supports the weight of the body, and maintains the shape of the body.
For protection
The skeleton protects the internal organs from injuries. The cranium protects the brain, the vertebral column protects the spinal cord, and the rib cage protects the lungs and the heart.
For locomotion
The skeleton provides a surface for the attachment of muscles, ligaments and tendons, altogether form a system which allows movement.
For production
Red bone marrow is the site for the production of blood cells.
For storage
Yellow bone marrow is the site for the storage of fat. The skeleton serves as a calcium reservoir.