Nitrogenous Waste Excretion

• Animals accumulate nitrogenous wastes like ammonia, urea, and uric acid.
• These substances must be removed totally or partially.
• Ammonia is the most toxic form of nitrogenous waste.
• Ammonotelism is the process of excreting ammonia.
• Terrestrial animals excrete lesser toxic nitrogenous wastes like urea and uric acid.
• Mammals, many terrestrial amphibians, and marine fishes mainly excrete urea.
• Reptiles, birds, land snails, and insects excrete nitrogenous wastes as uric acid.
• Uric acid is the least toxic form of nitrogenous waste.
• Urea is converted from ammonia in the liver and excreted by the kidneys.
• Uric acid is excreted in the form of a pellet or paste with a minimum loss of water.

Test your knowledge on how animals get rid of nitrogenous wastes with this informative quiz. Learn about the different forms of nitrogenous waste, their toxicity levels, and the excretory processes of various animal groups. Challenge yourself to identify which animals excrete ammonia, urea or uric acid, and understand the role of the liver and kidneys in nitrogenous waste removal. Take the quiz now and become an expert on animal excretion!