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10 March, 22:39

What are alveoli and what do they do?

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  1. 10 March, 23:01
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    Are tiny sac with our lungs that allow oxygen and carbon dioxide to move between the lungs and blood stream
  2. 10 March, 23:02
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    Alveoli are tiny sacs within our lungs that allow oxygen and carbon dioxide to move between the lungs and bloodstream
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