Proteins in food are broken down to smaller molecules and be transported to the blood stream, The blood sent the small protein molecule here. The excess smaller protein molecules are changed into urea. The urea are sent to the blood stream., The blood with the urea is taken to this organ and is filtered. , The urea and excess water (urine) from the blood is removed and is flowed through this tube., The urine is stored temporarily here., The urine can flow out to the outside through this tube..

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