• The kidneys job is to excrete out waste substances
• Urea is composed of nitrogen which can be toxic to the body
• Nitrogen is usually found around the body in the form of amino acids, these are generally good for the body but can be dangerous when found in large quantities (excess amino acids)
• Amino acids are broken down in the liver to form Urea and is then circulated to the kidneys where the urea is FILTERED out from the rest of the blood stream
• The urea is then added with water to form urine which is then passed down to the bladder where it is ready to be removed
• The filtered blood then returns to the body free of the toxic urea and nitrogen
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