Final answer:
Skeletal muscles are attached to the skeleton by tendons and when they contract, they pull on the bones to cause movement. The skeletal system acts as a system of levers and the muscular system provides the force for movement.
Step-by-step explanation:
Skeletal muscles are attached to the skeleton by tough connective tissues called tendons. Many skeletal muscles are attached to the ends of bones that meet at a joint. When the muscles contract, they pull on the bones, causing them to move. The skeletal system provides a system of levers that allow body movement, while the muscular system provides the force that moves the levers.