we show the excretion of urea which contains nitrogen which is toxic to the body -The amino acids are used for growth and excess amino acids needs to b removed
- Blood circulates to the liver and the amino acids are broken down and converted to a molecules which we called urea.
- This re-enters into the blood stream and which then enters both kidneys.
- The kidneys will filter the urea from the blood and the urea will be added to water to form urine and travel down the ureter to collect in the bladder which is stored there as the form of urine.
- The filtered blood travels back to the blood stream without any urea.
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