1. Support and Structure: The skeleton provides a framework for the body, giving it shape and allowing us to stand upright. It supports our muscles, organs, and tissues, preventing them from collapsing.

2. Protection: The skeleton acts as a protective barrier for vital organs. For example, the skull protects the brain, the rib cage protects the heart and lungs, and the vertebral column protects the spinal cord.

3. Movement: The skeleton, in conjunction with muscles, allows us to move. Joints, where bones meet, allow for flexibility and range of motion. Muscles attach to bones via tendons, and when they contract, they pull on the bones, causing movement.