Excretion is the system to eliminate metabolic wastes from the human bodyImportance of excretion
(a)Prevent the accumulation of metabolic waste products and toxic substance in the body
(b)Maintain the normal composition of fluids in the body, including the pH and water contents
The examples of metabolic wastes are salts, urea, carbon dioxide and water
The three major human excretory organs are skin, lungs and kidney
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