Concept:Pulmonary circulation is the circulatory route between the heart and the lungs.Explanation:The word "pulmonary" relates specifically to the lungs.Deoxygenated blood is sent from the heart to the lungs through the pulmonary arteries.Inside the lungs, carbon dioxide is released and oxygen is absorbed.The oxygenated blood then returns to the heart through the pulmonary veins.Hence, this circulation moves blood to and from the lungs.Answer:D. lungs