The ureters are tubes that transport urine from the kidneys to the urinary bladder. Urinary bladder is a muscular sac that temporarily stores urine.
Micturition is the mechanism by which the urinary bladder is emptied when it becomes filled. Read about the higher centers that control micturition in this article.
Tubular reabsorption is the mechanism by which water and other substances are transferred back to the blood from the renal tubules. Read about the mechanisms of reabsorption as well as the site at which it happens.
Urine formation happens in three major steps, The first step is glomerular filtration, which is followed by the tubular reabsorption and the tubular secretion. Click here to read about these steps in detail.