What material is urine composed of?
Urine is normally composed of water and wasted products filtered
form the body. The kidney produces urine. The other main function
of the kidney is to regulate fluid balance in the body. It performs
this function by using a selective osmosis system. basically, the
way it works is that electrolytes (dissolved salts like sodium,
potassium, calcium, carbonate, chloride) are pumped back into or
out of urine and blood so that in the end, just the right amounts
of electrolyte and water exit the kidney blood vein. The rest ends
up in urine. Interestingly, normal urine is sterile and has no
bacteria.
Urine contains 95% water and 5% solids. More than 1000 different
mineral salts and compounds are estimated to be in urine. So far,
our scientific community knows of about 200 elements. Some
substances are: 
vitamins, amino acids, antibodies, enzymes, hormones,
antigens, interleukins, proteins, immunoglobulins, gastric
secretory depressants, tolergens, immunogens, uric acid, urea,
proteoses, directin, H-11 (a growth inhibitory factor in human
cancer), and urokinase.
Believe it or not, scientists have know for years that urine is
antibacterial, anti-protozoal, anti-fungal, anti-viral, and
anti-tuberculostatic!
So now you know.......is like you learn something new
everyday..lolxz!! 
