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Pie
3 years ago
7

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

Biology
2 answers:
dusya [7]3 years ago
6 0
The answer is D: alveoli. These small sacks are how the oxygen is exchanged into the bloodstream in exchange for carbon dioxide.
Igoryamba3 years ago
5 0

i think it is D alveoli

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