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