So, if this is our nephron, then this is our collecting duct. Now, the collecting duct extends all the way from the cortex of our kidney to the medulla portion of our kidney. And our collecting duct connects the distal convoluted tubule, this section here, to the ureter that basically extends from our collecting duct and into the urinary bladder, where the urine is actually stored. 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?