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