2.67b Human Organs of Excretion

Key Points:
1. The major organs of excretion include the lungs, which waste carbon dioxide,the kidneys, which excrete excess water, urea and salts. Urea is the nitrogen waste from amino acids.
2. The third organ of excretion is the skin, which excretes water, salts and to a partial degree, urea but not in large amounts.
3. All of these organs display the loss of metabolic waste