What is the order of the blood circulation A. After arteries have delivered all of the oxygen the blood picks up carbon dioxide, B heart pumps blood to the lungs to pick up oxygen, Clungs bring in oxygen when you breathe,D veins carry carbon dioxide- rich blood back to the heart ; the heart pumps this blood to the lungs, E the blood drops off carbon dioxide and picks up oxygen once again, F oxygenated blood circulates back into the heart and is then pumped to all parts of the body through the arteries