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  • hi john!
  • hi 
  • but how do we breath?
  • the respiratory system helps us breath because it takes in oxygen and breaths out co2
  • how dose are heart prvoide oxygen for our blood?
  • And you're heart pumps it through your body and provides oxygen
  • you're blood carries the co2 to your lungs and then is exhales.
  • how dose our body breath out co2?
  • yes it is a gas exchange between plants and people!
  • so plants provide oxygen for us and we breath co2 for them?
  • so the respiratory system keeps us alive by breathing oxygen and geting rid of co2
  • yes it keeps us alive and is awalys doing it's job!
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