muscular still asteroids people stay & moving a part of something helps that something move ->  muscular movement moves a part of animals to help them move  muscular movement moves a part of animals to help them move & a bone is a part of a body -> muscular still two lab to thwart people stay muscular movement moves bones to help animals move  muscular movement moves bones to help animals move & pulling is a kind of motion -> skill  releasing animals to stay the fertilizer muscles  pull bones to move the bones  skill  releasing animals to stay the fertilizer & the muscular system contains muscles -> the muscular system pulls bones to move the bones