How does the blood differ in its component in a mammal when it enters the lungs and when it's leave them
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when blood enters in lungs diffusion occur in between alveoli and RBC. 1 RBC leave CO2 in lungs and carry 4 molecules of oxygen to the other body part which is pumped through left side(oxygenated) of heart.
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The deoxygenated blood containing carbon dioxide is brought to the lungs from the rest of the body. Here exchange of gases takes place and carbon dioxide is released to the outside. The blood which leaves lungs is rich in oxygen.
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