Labels:bannister | box | hakham | person | pole | tree OCR: HELP Joints and Muscles Page You use muscles to make Elbow your body move Muscles The cause movement by becoming shorter (contracting As they contr act, they pull against the bone causing your straighten The body to are bend or attached to The flexor the arm muscle up pulls pulls 'the extensor arm muscle down Muscles your bones by tendons muscle can move joint in one direction only can pull but not push You need second muscle on the other side of the joint to pull the muscle the other way HELT
(.png)
