Biology
Biology, 16.06.2020 16:57, addisonrausch

What are alveoli? A. Part of a red blood cell
B. Air sacs used during respiration
C. Tubes that connect the heart to the lungs
D. Carbon dioxide molecules

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What are alveoli? A. Part of a red blood cell
B. Air sacs used during respiration
C. Tu...

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