recall that the lungs, kidneys and skin are organs of excretion
1. lungs (first organ of excretion) excretes CO(2)
2. kidneys (second organ of excretion) excretes excess water, urea and salts,
-urea is nitrogen waste from excess amino acids-
3. skin. excretes water, salts (in sweating) and a tiny bit of urea
1. lungs (first organ of excretion) excretes CO(2)
2. kidneys (second organ of excretion) excretes excess water, urea and salts,
-urea is nitrogen waste from excess amino acids-
3. skin. excretes water, salts (in sweating) and a tiny bit of urea
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