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24 April, 20:46

In which part of the human respiratory system does actual oxygen exchange take place?

A.

bronchi

B.

trachea

C.

diaphragm

D.

alveoli

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Answers (1)
  1. 24 April, 21:02
    0
    The answer is D: alveoli. These small sacks are how the oxygen is exchanged into the bloodstream in exchange for carbon dioxide.
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