Relacionar Columnas Natural ScienceVersión en línea Vocabulary por Marta Castaño 1 Our teeth chew the food in the mouth 2 the food goes to the stomach 3 It carries oxygen in the blood 4 The heart pumps blood 5 We breathe air through our nose 6 It gives us the oxygen we need to live It's a respiratory system It's a digestive system It's the digestive system It's the respiratory system It's the circulatory system It's a circulatory system