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These small sac like structure are known as the alveoli . The alveoli help in the exchange of the gases, oxygen & carbon-dioxide,

Lungs contain alveoli to increase the surface area and to easily transport oxygen to the blood vessels which surrounds the air sacs. Also, the air sacs have a thin film of oxygen which helps to absorb oxygen quickly.

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6y ago
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9y ago

A tiny sac of lung tissue is an alveolus, but they are usually referred to in the plural, "Alveoli". (al-vee-OH-lye)

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6y ago

Alveoli are small balloon like structures in the lungs. They are in groups, like grapes, upside down on a tree-like structure.

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11y ago

This division if for absorption of O2 and gaseous exchange .

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15y ago

alveoli

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12y ago

aveoli

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12y ago

alveoli

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13y ago

alveoli

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