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What are tiny air sacs through which oxygen and carbon dioxide pass in and out of the bloodstream

asked
User ItsKarma
by
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2 Answers

7 votes
Alveoli is the answer
answered
User Jack Culhane
by
8.5k points
3 votes
They are called alveoli.
answered
User Omer Mazig
by
8.1k points
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