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1 March, 16:37

What are alveoli and what do they do?

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  1. 1 March, 19:24
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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. 1 March, 20:06
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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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