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They are called Alveoli. They act as the primary gas exchange. Their wall is thin, and is surrounded by capillaries. This allows exchange of oxygen and carbon dioxide between the respiratory and circulatory systems.

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9y ago
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13y ago

It is the alveoli

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11y ago

The grape like clusters of air sacs within the lung are called alveoli.

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16y ago

Aveoli?

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11y ago

Alveoli.

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Q: What are the air sacs in clusters in the lungs?
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