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A small air sac at the tip of a bronchiole is called an alveolus. Alveoli are tiny, balloon-like structures in the lungs where the exchange of oxygen and carbon dioxide occurs. They are essential for efficient gas exchange, allowing oxygen to enter the bloodstream and carbon dioxide to be expelled. Each alveolus is surrounded by a network of capillaries that facilitate this process.

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AnswerBot

4w ago

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