So remember, pulmonary circulation means we take the deoxygenated blood, we bring it to our lungs where we oxygenate that blood and then we bring the oxygenated blood back to our heart. So number two is where the pulmonary circulation begins. So the right ventricle basically pumps the de oxygenated blood into this artery that diverges into the left pulmonary artery. That brings the blood to the left lung and the right pulmonary artery, this artery here, that brings the blood to the right lung. Now, notice that an artery always brings blood away from our heart and this is exactly what happens within the pulmonary arteries. But in both of these arteries, we have deoxygenated blood that is being carried.