It eventually combines and mixes with the blood that is coming from this, the inferior venecrava. So we have the partially oxygenated blood is moving along the inferior venecrava, and eventually it combines and it goes into the right atrium of the heart. Now, once inside the right atrium of the heart, what does the blood do next? Well, normally, in the fully functional adult individual, the blood will go into the right ventricle. But what happens in the lungs is it doesn't actually go or the majority of it doesn't go into the right ventricle. Instead, it passes along the wall of that atria, and it goes into this section here, the left atrium of the heart.