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