Q3 of 95 Page 78

In a coloured diagram why do we generally show the pulmonary artery in blue and pulmonary vein in red colour?

Conventionally, in a coloured diagram we show the pulmonary artery in blue because it carries the deoxygenated blood from the heart to the lungs, whereas, pulmonary vein is shown by red colour because it carries oxygenated blood from the lungs to the heart for circulation.


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