Date: Around 1993
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
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!
Update April, 2000
It is either anti-tuberculous or tuberculostatic. "Anti-tuberculostatic" would mean that it counters tuberculostatic (stopping the growth of tubercle bacilli) effect.
L.B. Sandy Rock, MD, MPH
Click here to return to the Biology Archives
Update: June 2012