The voltage delivering 1 watt depends on how many amps are present. We use watts to measure power (P), and amps (I) times volts (E) equals watts.
The urea and water that make up urine are removed from the blood in  the kidney. This is then passed on to the bladder which will be  excreted as urine.
Uremia is a condition marked by elevated levels of urea in the blood. Urea is the waste by-product of protein breakdown. Healthy kidneys remove urea from the blood and uremia can be a sign that your kidneys are shutting down. Uremia is very dangerous and can lead to heart and brain failure.