what is kidney how this need in our body
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KIDNEY
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Kidneys are bean-shaped structures located on either side of the backbone and are protected by the ribs and muscles of the back. Each human adult kidney has a length of 10-12 cm, a width of 5-7 cm and weighs around 120-170g.
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FUNCTIONS
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Internally a kidney is made of numerous microscopic excretory units called nephrons. The function of kidney is filtration of blood to excrete the waste products of metabolism. The kidney filters about 190 litres of blood to produce 0.9-2 l of urine daily.
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Explanation:
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