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urea is is the main source of urine
urea
urea
The Hepatic Portal Vein
0.9 percent
Serum Urea level 2.5 -7.8 mmol/L
Urea is an endogenous product of protein and aminoacid catabolism, and consequently 20-35 g of urea is excreted daily in human urine in avolume of about 1 - 1.5 litres.
Urea and Water.
portal vein
Urea is the main nitrogenous waste in urine. It is an organic compound that is essential for metabolism in humans because it allows the kidneys to produce hyperosmotic urine.
Urea was discovered in 1773 by H.M. Rouelle in human urine.
No they do not. Humans does not contain ammonia in urine.