Now, of course, the lungs do need oxygen. They do need a tiny bit of oxygen to actually develop over time so that once that fetus is born, those lungs can function effectively and efficiently. So a tiny amount of oxygenated blood does actually pass along aropulmonary arteries and eventually reaches the capillaries of the lungs. So these are the capillaries of the lungs. And so once the oxygen is deposited into our lungs, what happens is that deoxygenated blood returns via these pulmonary veins and it returns into the left vet, or the left atrium of the heart. So it travels this way along these pulmonary veins, and eventually it connects and it deposits into the left atrium of the heart.