2.67b)- Human Organs of excretion

Recall that the lungs, kidneys and skin are organs of excretion

1. Lungs- Carbon dioxide 
2. Kidney- Excess water, Urea (Waste from amino acids) and salts
3. Skin- Water, Salts and urea (not much)

Metabolic waste- Carbon dioxide, Water, Urea and Salts