pickle1233 pickle1233

16-05-2017
Health

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what is the main organ of the respiratory system ?

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treymayo97 treymayo97

16-05-2017

The lungs are the main organ in the respiratory system.

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Аноним Аноним

16-05-2017

The main organ of the respiratory system is the lungs. The lungs let oxygen in and out.

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