In fact, as we go down along the medulla, we have an increasing concentration of the solute of the sodium and chloride as we go lower and lower. And we'll see why that's important in just a moment. Now, between our cells, we have Thai junctions. And these tight junctions prevent the leaking or the movement of water from the lumen and into our interstituum. So no water is actually absorbed and no water actually flows into our thick ascending loop of Henley. The thick loop of Henley is impermeable to water.