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what function do the alveoli perform?

A. exchange oxygen in the air for carbon dioxide in the blood. B. hold receptors for the sense of smell. C. exchange oxygen in the blood for carbon dioxide in the air. D. carry oxygen blood away from the heart.

C. exchange oxygen in the blood for carbon dioxide in the air.

which organ of the respiratory system is located inside the lungs? A. nasopharynx B. bronchioles C. larynx D. trachea

B. bronchioles