Alveoli are called functional unit of lungs.
Give reason.
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Answer and explanation: This is because of the fact that the exchange of gases takes in lungs through alveoli . They are the smallest pathway for exchange of gases as they are just one cell thick . ... That is why Alveoli are called the functional unit of lungs .
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Answer:
Explanation: alveoli are functional unit of lungs because:
They filter the air in the lung and help in gaseous exchange of carbon dioxide and oxygen
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