So previously I said that the function of the loop of Henley is to ultimately allow the nephron to absorb more water. And it absorbs more water via passive diffusion without actually using any energy. So the thick ascending loop of Henley uses energy to establish an electrochemical gradient, so that the water inside the descending loop of penalty flows out of the tubule without actually using any ATP molecules. And that only happens when the water moves down its gradient from a low solute concentration to a high solute concentration. Now, let's move on to the thin ascending loop of Henley. So, if we look at the following diagram, this is the thin ascending loop of Henley.