The Cuboidal Villi of the Lubricant Leak

As we're going down towards the medulla, it's thin, it's flat. Minus down and the only thing that's really moving here is water. So what is it that gets thrown back into the body or reabsorbed here at the thin descending limb of the lubricant leak? I think it's pretty straightforward. The longer the tubule, the more time you have for water to be reabsorbed,. which means the more water goes back into your body., so the more hydrated you are, and also the more concentrated your urine will be.