Here's why:

* Bones: The skeletal system is made up of bones, which act as the framework of the body. They provide support, allowing us to stand, walk, and move.

* Joints: Bones are connected by joints, which allow for flexibility and movement.

* Cartilage: Cartilage, a strong but flexible tissue, cushions the ends of bones, preventing them from rubbing together.

While other systems contribute to the body's overall structure (like the muscular system for movement), the skeletal system is the foundation that gives the body its shape and support.