Biology (NTSE/Olympiad)  

4. Excretion

Waste Products

Waste Products
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.
Carbon dioxide
Excess water.


NTSE Biology (Class X)

NTSE Biology (Class IX)


NTSE Physics Course (Class 9 & 10)

NTSE Chemistry Course (Class 9 & 10)

NTSE Geography Course (Class 9 & 10)

NTSE Biology Course (Class 9 & 10)

NTSE Democratic Politics Course (Class 9 & 10)

NTSE Economics Course (Class 9 & 10)

NTSE History Course (Class 9 & 10)

NTSE Mathematics Course (Class 9 & 10)