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