Question

which is the only artery which carries impure blood and why is it call so

Answer 1

pulmonary arteries I 5

Answer 2

All veins in the body transport deoxygenated blood to the heart except for the pulmonary veins. Recall that in internal respiration, oxygen diffuses from the alveoli to the deoxygenated blood. When this happens, the blood then becomes oxygenated.

The function of the pulmonary veins is to transport that oxygenated blood from the lungs to the heart. They are still called veins because they transport blood to the heart, regardless of whether or not the blood is deoxygenated or oxygenated.

Similarly, all arteries in the body transport oxygenated blood away from the heart except for the pulmonary arteries. Recall that in systemic circulation, when deoxygenated blood is transported back to the heart, the blood must be reoxygenated.

The function of the pulmonary arteries is to transport the deoxygenated blood to the lungs where it can be reoxygenated through diffusion. They are still called arteries because they transport blood away from the heart, regardless of whether or not the blood is deoxygenated or oxygenated.