The skeletal muscles that contract and shorten to move the bones form the system.

The skeletal muscles that contract and shorten to move the bones form the muscular system; the muscular system enables movement through contraction and relaxation of the muscles, this moves the skeletal system which is the body's support system to protect the organs and structure of the body.

If you get a map and put the countries a states all together it forms all one piece you can also tell because of the earth quakes