What is the function of alveolis?
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The alveoli have an elastic-like
structure, which means that there is an amount of effort needed to
inhale oxygen into the lungs, but that same structure assists with
exhaling. The process of breathing is also made easier by a liquid that
coats the alveoli and reduces the surface tension on the structures.
This fluid is called surfactant, which reduces the surface tension by a
factor of approximately 15. This allows the alveoli to inflate with a
very small change in pressure.
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Tiny air sacs at the end of the bronchioles (tiny branches of air tubes in the lungs). The alveoli are where the lungs and the blood exchange oxygen and carbon dioxide during the process of breathing in and breathing out.
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