What is the actual site of gas exchange in th | vedclass

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(A) The $Alveoli$ are the primary sites of gas exchange in the lungs.These are thin-walled,bag-like structures surrounded by a dense network of blood

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Alveoli

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(A) The $Alveoli$ are the primary sites of gas exchange in the lungs.These are thin-walled,bag-like structures surrounded by a dense network of blood capillaries.Oxygen diffuses from the $Alveoli$ into the blood,and carbon dioxide diffuses from the blood into the $Alveoli$ due to partial pressure gradients.Other structures like the $Trachea$ and $Bronchioles$ serve as conducting passages for air but do not participate in gas exchange.

What is the actual site of gas exchange in the lungs?

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