Saturday, November 5, 2011

2.67 Human organs of Excretion [part b]

LUNGS: - the lungs (first organ of excretion)
- excrete carbon dioxide, waste of respiration

KIDNEYS- excretion of excess water (urea-nitrogen waste from amino acids) and salts

SKINS:- known to excrete water like salt
- sweating
-urea (not very much)
- mostly water and salt (sweat)

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