Typing Practice


There is red and blue blood in our body. Red blood flows in arteries, which is pure blood (oxygenated blood), whereas blue blood flows in veins which is impure blood (deoxygenated blood). Then why do we always see red blood when we have a cut on our body? That is because when the blue blood is exposed to outside air the oxygen present in air is absorbed into it and it becomes oxygenated blood which is again red blood.


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