The muscular and skeletal systems work together to help the body move and shape itself. Bones give the body shape and in turn, make many joints that allow your body to connect with the muscular system to allow you to move.
The muscular and skeletal systems often work together awsell, muscles in your chest interact with the resipratory system by tightening and contracting to create a vacuum around the lungs, this causes air to flow in. When you exhale, the muscles and lungs deflate and start the process again.