what do the pulmonary veins do
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.wo 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.