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AN ACCOUNT OF NITROGENOUS EXCRETION IN MAMMALS Excretion is the disposal of the waste products of metabolism, example ammonia and urea from
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AN ACCOUNT OF NITROGENOUS EXCRETION IN MAMMALS Excretion is the disposal of the waste products of metabolism, example ammonia and urea from deamination of amino acids and disposal of substances present in excess e.g. water, salts. Excretion is the elimination of the unwanted products of metabolism and of metabolites present in excess within the organism. Animals excrete nitrogenous waste products such as ammonia, urea or uric acid. These or similar products are produced by the deamination of any excess protein that has been eaten. Nitrogenous compounds are formed in metabolism of proteins and nucleic acids. Ammonia is lost by diffusion from small aquatic organisms, urea is excreted by organs of nitrogenous excretion example the kidney. Excretion involves eliminating any excess or toxic substance taken in with the diet, including water and salts. Excretion plays an important part in the process by which the internal environment is regulated to maintain more or...
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