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The alveolar walls are ________ thick and aid in the exchange of oxygen and carbon dioxide.

koklok123

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The alveolar walls are ________ thick and aid in the exchange of oxygen and carbon dioxide.

The alveolar walls are ________ thick and aid in the exchange of oxygen and carbon dioxide.

A) 10 cells B) 3 cells C) 1 cell D) none of the above

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tgreen77

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