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Alveoli, (from Latin alveoli, "little cavities") are an anatomical structure which have the form of hollow cavities. Found in the lung, the pulmonary alveoli are spherical extensions of the respiratory bronchioles (small air passages leading off the windpipe) and are the primary sites of gas exchange with the blood. Alveoli are only found in the lungs of mammals.

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15y ago
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14y ago

Lungs contain many tubes:trachea,bronchi,bronchus,bronchi oles and At the end of each bronchi ole is a special area that leads into clumps of teeny tiny air sacs called alveoli.

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13y ago

Type your answer here... alveoli

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14y ago

alveoli

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Q: What are small air sacs in your lungs?
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