Sunday, 30 October 2011

2.67b Human organs of Excretion

- Salt and water is from sweat.
1. Lungs - metabolic waste is carbon dioxide - from respiration
2. Kidneys - excretion of excess water, molecule Urea (nitrogen waste from amino acids) and Salts
3. Skin - excretion of water and salts as sweat and very small amounts of Urea

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