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.
The amino acids that are not used up as proteins (because we canât store it) are converted into urea. Urea is broken down protein made in the liver and sent to the kidneys to be excreted as urine (urea is toxic and must be excreted as waste). The Dr can measure urea by doing a blood test called a BUN.