sentences: muscular movement helps animals move & 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 movement moves bones to help animals move  muscular movement moves bones to help animals move & pulling is a kind of motion ->  muscles  pull bones to move the bones  muscles  pull bones to move the bones & the muscular system contains muscles -> the muscular system pulls bones to move the bones