The part of the respiratory system where oxygen and carbon dioxide are exchanged is called the alveoli.

Question

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The alveoli are small, thin-walled sacs located at the end of the bronchioles in the lungs, where gaseous exchange occurs between the air and the bloodstream. Oxygen diffuses from the air in the alveoli into the blood vessels while carbon dioxide diffuses from the blood vessels into the air in the alveoli.

The Part of the Respiratory System Where Oxygen and Carbon