That are large blood vessels that receive oxygenated blood from the lungs and drain into the left atrium of the heart.The pulmonary veins are among the few veins that carry oxygenated blood.
On the other hand, pulmonary veins are large blood vessels that receive oxygenated blood from the lungs to delivery to the rest of the body. There are 4 total pulmonary veins—with 2 pulmonary veins coming from each lung, left and right—that empty into the left atrium of the heart. Function. While veins usually carry deoxygenated blood from tissues back to the heart, in this case, pulmonary veins are among the few veins that carry oxygenated blood instead. Oxygenated blood from the lungs is circulated back to the heart through the pulmonary veins that drain into the left atrium. Right pulmonary veins. Veins are the blood vessels that carry blood to the heart. Pulmonary veins are responsible for carrying oxygenated blood from the lungs back to the left atrium of the heart. This differentiates the pulmonary veins from other veins in the body, which are used to carry deoxygenated blood from the rest of the body back to the heart. Humans have four pulmonary veins in total, two from each lung The pulmonary veins are large blood vessels that receive oxygenated blood from the lungs and drain into the left atrium of the heart. There are four pulmonary veins, two from each lung. The pulmonary veins are among the few veins that carry oxygenated blood. Two pulmonary veins emerge from each lung hilum, receiving blood from three or four bronchial veins apiece and draining into the left atrium. An inferior and superior vein drains each lung, so there are four veins in total. The veins are fixed to the pericardium. © MedValet. Definition: Veins are vessels that bring blood to the heart. Pulmonary veins carry oxygenated blood from the lungs to the left atrium. There are four pulmonary veins which extend from the left atrium to the lungs. They are the right superior, right inferior, left superior, and left inferior pulmonary veins The pulmonary artery and pulmonary vein originates in the heart. What is different about them is that the pulmonary artery carries deoxygenated blood (blood without oxygen) as … supposed to other arteries, which carry oxygenated blood. And the pulmonary vein carries oxygenated blood unlike other veins, which carry deoxygenated blood. Confidence votes 10.2K. The word pulmonary refers to the lungs, so the pulmonary vein is a blood vessel that runs from the lungs to the heart. It carries oxygenated blood, which is unusual for veins, which (apart from this one) transport de-oxygenated blood to the heart. 
https://www.kenhub.com/en/library/anatomy/pulmonary-arteries-and-veins http://www.healthline.com/human-body-maps/right-pulmonary-veins https://en.wikipedia.org/wiki/Pulmonary_vein http://biology.about.com/od/biologydictionary/g/pulmonaryveins.htm http://www.answers.com/Q/What_does_the_pulmonary_vein_do http://www.answers.com/Q/What_does_a_pulmonary_vein_do_for_the_heart
what do the pulmonary veins do