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