Without a skeleton we would not be supported and would simply flop about like a rag doll. This would mean that we would not be able to move from one place to another.
The skeleton also gives protection to delicate organs in our bodies such as the brain, heart, and lungs. It acts as a support to all the soft parts of the body.
The skeleton also provides a system of levers that the muscles can work on, enabling us to carry out all our movements.