Skeleton
A 'skeleton' is the hard structure that supports the body of a living thing. Skeletons can be inside the body or outside the body. In mammals, which include humans, the skeleton is made of bones. The skeleton supports the skin, muscle and tissue, and all the organs that are inside the body. The skeleton protects important internal organs like the brain, heart and lungs. If humans didn't have a skeleton then the body would be flat as the skeleton gives the body its frame.