are peritubular cappilaries and vasa recta are same in the case of henle`s loop?
The peritubular capillaries are tiny blood vessels located over the proximal and distal part of the tubule in nephron. But vasa recta are series of straight capillaries lie parallel to the loop of Henle. Both these are blood capillaries but they are not same. The natures of absorption of filtered by both these capillaries are different. Ions and minerals are reabsorbed into the peritubular capillaries through active transport. On the descending portion of the vasa recta, NaCl and urea are reabsorbed into the blood, while water is secreted. On the ascending portion of the vasa recta, NaCl and urea are secreted while water is reabsorbed.