Diffrence between ore nd rock forming mineral
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Ammonia, urea and uric acid are the major nitrogenous wastes excreted. ... They not only eliminate nitrogenous wastes but also help in the maintenance of ionic and acid-base balance of body fluids. In humans, the excretory system consists of one pair of kidneys, a pair of ureters, a urinarybladder and a urethra.
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