Function of Alveoli

Very Easy Biology Human Physiology

In the human body, the respiratory system is primarily responsible for the exchange of gases. During inhalation, oxygen enters the lungs while carbon dioxide is expelled. One of the key structures in the respiratory system that facilitates this exchange is the alveoli.

Which of the following statements correctly describes the main function of the alveoli?

They transport oxygen from the lungs to the bloodstream.

They provide a surface for gas exchange between air and blood.

They help regulate blood pH by removing carbon dioxide.

They ensure the movement of air in and out of the lungs.

Hint

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