the tiny hollow air sacs in the lungs where gas exchange takes place are the a. alveoli b. lymph nodes c. capillaries d. bronchioles
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The tiny hollow air sacs in the lungs where gas exchange takes place are the "a. alveoli". These are the "last stop" on the respiratory tree and are responsible for oxygen exchange.
The tiny hollow air sacs in the lungs where gas exchange takes place are the a) alveoli
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