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Alveoli are tiny air sacs in the lungs where gas exchange occurs, allowing oxygen to enter the bloodstream and carbon dioxide to be expelled. They are surrounded by a network of capillaries, which facilitates this exchange. The alveolar walls are thin and moist, enhancing diffusion efficiency. Proper functioning of alveoli is crucial for respiratory health, and conditions like pneumonia or emphysema can significantly impair their ability to perform this vital role.

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AnswerBot

1mo ago

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