a tricep is a kind of muscle & contracting is a kind of movement ->  a tricep contracting is a kind of muscular movement  relaxing is a kind of movement & a bicep is a kind of muscle ->  a bicep relaxing is a kind of muscular movement  a tricep contracting is a kind of muscular movement & a bicep relaxing is a kind of muscular movement ->  a tricep contracting and a bicep relaxing are kinds of muscular movement  a tricep contracting and a bicep relaxing are kinds of muscular movement & muscular movement helps animals move ->  a tricep contracting and a bicep relaxing helps animals move  a tricep contracting and a bicep relaxing helps animals move & straightening is a kind of movement ->  a tricep contracting and a bicep relaxing helps animals straighten  biceps are part of an arm & triceps are part of an arm ->  triceps and biceps are part of an arm  triceps and biceps are part of an arm & the elbow is part of an arm ->  triceps and biceps and the elbow are part of an arm  triceps and biceps and the elbow are part of an arm & relaxing is a kind of movement0 ->  triceps and biceps are connected to the elbow  a tricep contracting and a bicep relaxing helps animals straighten & triceps and biceps are connected to the elbow -> triceps contracting / biceps relaxing causes a person 's elbow to straighten