Why alveoli are so small
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there are many small alveoli in our lungs instead of a few bigger ones because, they would have a much greater surface area for the exchange of oxygen and carbon dioxide. (as greater the no.,larger the surface area.)
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Alveolus are small in size because they helps in filtering of the de oxizanated blood to oxizanated blood it is very important process so they are in uncountable in number.
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