How nitrogenous wastes are removed?

How nitrogenous wastes are removed? 
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1 Answer

Answer :

• Simple aquatic animals excrete ammonia in surrounding water by diffusion.

• In higher animals ammonia is converted into less toxic compounds such as urea, and uric acid.

• Urea is excreted out in the form of urine.

• Uric Acid is produced in insects, reptiles and birds. It is excreted out in the form of crystals with little water. 
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