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Process of Respiration

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How does the blood differ in its components in a mammal when it enters the lungs and when it leaves them?

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Solution

When blood enters in lungs, diffusion occurs in between alveoli and RBC. An RBC leaves CO2 in the lungs and carries away 4 molecules of oxygen to the other body parts which (oxygenated blood) is then pumped through left side of heart.

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