Does re-absorption occur in the medulla?

Yes, reabsorption occurs in the medulla of the kidney, particularly in the loop of Henle and the collecting ducts. In these areas, water and certain solutes are reabsorbed back into the bloodstream, helping to concentrate urine and maintain the body's water and electrolyte balance. The medulla’s structure, including its gradient of osmolarity, plays a crucial role in facilitating this process.