They are being filled, they are fully relaxed. Now, in stage number two, now, our two atria contract because they are fully filled. That opens up these two atrial ventricular valves and allows the movement of our blood from the atria and into our two ventricles. Here we have the oxygenated blood, but here we have oxygenated blood. Now, at this point, these two ventricles are fully relaxed while these two atria are fully contracted or they're contracting. And in stage number three, it's these ventricles that are now fully filled.