We use the locomotor system to move us, it's made up of the skeletal system and the muscular system.
The skeletal system is made up of 206 bones, they are hard and solid, joints that where 2 bones meet and ligaments that join together bones and joints.
The muscular systems is made up of skeletal muscles they are voluntary muscles, we choose to move them, smooth muscles they are involuntary muscles, we do not choose to move them, cardiac muscles they are in the heart, they contract automatically and tendons they attach muscles to bones.