Sunday, 30 October 2011

2.68a - Excretion

- blood circulates to the liver and is converted into Urea
- it then re-enters the body and circulates to the kidneys.
- Kidneys then filter the Urea from the blood and the Urea is then added to water to form Urine which then travels down the Uritus
- Then collected in the bladder (form of Urine) - filtered blood then goes back to veins with toxic Urea removed

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