Multiple choice general knowledge science & technology Which of the following statements is correct Pulmonary artery carries pure blood Pulmonary artery carries impure blood Pulmonary vein carries impure blood None of these Reveal answer Fill a bubble to check yourself B Correct answer Explanation The pulmonary artery carries deoxygenated blood from the heart to the lungs for oxygenation - this is why it's called 'impure blood.' The pulmonary vein does the opposite, carrying oxygenated blood back to the heart.