Multiple choice

What function do alveoli perform?

  1. the exchange of lymph between air and lymph nodes

  2. the exchange of blood between the heart and lungs

  3. the exchange of gases between the lungs and the bloodstream

  4. the removal of water from oxygen
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Alveoli are the sites where oxygen enters the bloodstream and carbon dioxide leaves the bloodstream through the process of diffusion.

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