where does the blood in the pulmonary vein come from
Pulmonary vein The pulmonary veins are the veins that transfer oxygenated blood from the lungs to the heart. The largest pulmonary veins are the four main pulmonary veins, two from each lung that drain into the left atrium of the heart. The pulmonary veins are part of the pulmonary circulation.
Inferior vena cava The corresponding vein that carries deoxygenated blood from the upper half of the body is the superior vena cava.
Marcus Álvarez
My Ántonia