About Human Body Systems

Learn the primary function of alveoli in the respiratory system for HESI A2 Biology. Discover how gas exchange occurs between air and blood in the lungs.

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Human Body Systems HESI A2 Practice Questions

Free Human Body Systems practice questions for the HESI A2 exam with detailed rationales.

Question 2 of 2

What is the primary role of the alveoli in the respiratory system?
To regulate airflow through the bronchioles
To produce mucus that traps pathogens
To facilitate gas exchange between air and blood
To filter air entering the lungs

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