The product of the kidneys is urine

The product of the kidneys is urine -...

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The product of the kidneys is  urine , a watery solution of waste products, salts, organic compounds,  and two important nitrogen compounds: uric acid and urea.  Uric acid  results from nucleic acid  decomposition, and  urea  results from amino acid breakdown in the liver. Both of these nitrogen  products can be poisonous to the body and must be removed in the urine.  Nephron The functional and structural unit of the kidney is the  nephron.  The nephron produces urine and is  the primary unit of homeostasis in the body. It is essentially a long tubule with a series of associated  blood vessels. The upper end of the tubule is an enlarged cuplike structure called the  Bowman's  capsule.  Below the Bowman's capsule, the tubule coils to form the  proximal tubule , and then it  follows a hairpin turn called the  loop of Henle . After the loop of Henle, the tubule coils once more as 
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