Maximum CO2 is seen in ?: (A) Pulmonary vein, (B) Pulmonary aery, (C) Left ventricle, (D) Left atrium
Answer is B. Ans. is 'b' i.e., Pulmonary aeryPulmonary aeries carry deoxygenated blood (with maximum CO2) to lung from right ventricle.In lung CO2 is removed and oxygenation of blood takes place.Pulmonary veins, then, transpo this oxygenated blood (with less CO2) to the left atrium.