So our filter travels from the distal convoluted tubule into and through our collecting duct into the ureter and then into the urinary bladder. And it is stored inside the urinary bladder until our body actually excretes it to the outside environment. Now, the question is, what exactly is the function of the collecting duct? Well, the collecting duct is involved in reabsorption, and we'll see what it reabsorbs in just a moment. So, under normal conditions, in the absence of any type of hormone, the collecting duct is impermeable to water. And that means no water is reabsorbed or secreted into our collecting duct.