Nitrogenous Waste Products : They are the major waste products which are formed during breakdown of extra amino acids, nucleic acids and alkaloids. The important nitrogenous waste products are urea, uric acid, creatine, creatinine and ammonia.
Non-nitrogenous Waste Products - Oxalic acid, lactic acid.
Excess Chemicals Excess minerals, drugs, pigments, vitamins, hormones, cholesterol, etc.
Bile Pigments Bilirubin, biliverdin and urochrome.
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