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.
Kidney Function. The kidneys make up one of your body's most important filtration and detoxification systems. One of their main roles is to remove urea from your blood for excretion in your urine. As urea is a byproduct of protein metabolism, healthy kidneys are vital to your body's ability to use protein.In addition to removing urea, your kidneys work hard to keep protein in your bloodstream.s urea is a byproduct of protein metabolism, healthy kidneys are vital to your body's ability to use protein. In addition to removing urea, your kidneys work hard to keep protein in your bloodstream.