TEST UNIT 5Versión en línea PREGUNTAS SOBRE LOS SISTEMAS HUMANOS por alejandra Requena 1 Where does the oxygen pass into the blood? a lungs b stomach c brain d blood vessels 2 Which organ pumps blood to every parts of the body? a lungs b heart c nerves d stomach 3 Where do the nutrients pass into the blood? a mouth b esophagus c small intestine d large intestine 4 Which organ receives messages and sends instrucctions to the locomotor system a heart b brain c lung d liver