anialewandowki anialewandowki
  • 18-04-2017
  • Biology
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Each lung consists of millions of tiny air sacs called___. Each air sac is surrounded by a tiny blood vessel called a___.

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dellaM dellaM
  • 18-04-2017
Each lung consists of millions of tiny air sacs called alveoli.

Each air sac is surrounded by a tiny blood vessel called an arteriole.
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