I'm thinking you must be talking about a condition called hydroureter, meaning distention of the ureter with fluid. This is caused by an obstruction of the ureter (the duct between the kidney and the bladder). Several things can cause this obstruction. The most common is kidney stones. These accretions of salts form in the kidney. When the body tries to pass them, they must go through the ureter, which is very narrow, not made for passing solids. So they get stuck, and fluid (urine) builds up behind the obstruction, distending the ureter like a balloon. Once the stone passes and the obstruction is relieved, the ureter returns to normal size. Hydroureter can be dangerous in that excessive back pressure can damage the kidney, which can occur if the obstruction persists.
In the bladder, to be peed out.
bladder-storage place for waste kidney-blood filters and fluid regulator
they are the Floopa tubes
If you give excessive fluid to human, his kidney will excreate the extra water. But kidney can not excreate the plane water. It is going to wash 'some' salt along with the urine. So this causes hyponatremia.
No where, because if your kidneys have shut down then they are not making any pee, so there is no pee to go anywhere. What happens is fluid and impurities that are usually filtered out by the kidneys builds up in your blood, the extra fluid builds up in feet, legs and arms and eventually the person will die, unless they do dialysis.
If the blood vessels in the kidneys are damaged, they may stop removing wastes and extra fluid from the body. The extra fluid in the blood vessels may then raise blood pressure even more. It's a dangerous cycle.
Urine
the bladder
The urinary tract consists of the kidneys, ureters, and bladder. The kidneys filter waste and excess fluid from the blood to produce urine, which then travels down the ureters to the bladder for storage until it is expelled from the body through the urethra.
The main organ of the urinary system is the kidney. It filters blood to remove waste products and regulate fluid balance, producing urine that is then excreted from the body through the urinary tract.
Once the tubular fluid leaves the papillary duct in the kidney, it enters the minor calyx, which then flows into the major calyx, renal pelvis, and finally the ureter to be transported to the bladder for storage and eventual elimination as urine.
Fluid goes under the bladder. The bladder is there to isolate the fluid from air, since it's air that causes degradation in the fluid. Also, make sure just what type of fluid the manual calls for, since some systems use mineral oil-based fluids (brake fluid is glycol based). Also, the fluid type may be called out on the reservoir cap itself.