The process of breathing involves the flow of air inside and outside the lungs to carry out gas exchange between alveoli and blood. This process is mainly carried of oxygen from the alveoli to the blood and to other tissue cells and expulsion of carbon dioxide from the blood to the alveoli and finally to atmospheric air.

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Chapter 22, Problem 3TYK

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The process of breathing involves the flow of air inside and outside the lungs to carry out gas exchange between alveoli and blood. This process is mainly carried of oxygen from the alveoli to the blood and to other tissue cells and expulsion of carbon dioxide from the blood to the alveoli and finally to atmospheric air.

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