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