raelynn5
raelynn5 raelynn5
  • 27-04-2017
  • Biology
contestada

what are the main organs of the respiratory system?

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Аноним Аноним
  • 27-04-2017
it is the heart and lungs of course
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Reece41
Reece41 Reece41
  • 27-04-2017
The lungs and heart are used in the respiratory system
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