Relacionar Columnas UNIT 1 NATURAL SCIENCE 4 PRIMARIA THE HUMAN BODY .LOCOMOTOR SYSTEMVersión en línea PARTES DEL APARATO LOCOMOTOR por rosi rorobar 1 your muscles contract and relax when 2 Your muscles give your body 3 your skeleton protect your 4 your skeleton's bones join together 5 Tendons connect 6 ligaments connect they receive messages from your brain. internal organs and support your body muscles and bones the bones and joints at joins shape