A large quantity of one of the following is removed from our body by lungs.
1. CO2 only
2. H2O only
3. CO2 and H2O
4. ammonia
(c) Our lungs remove large amounts of CO2 (18L /day) and also significant amount of water everyday.
While respiration, CO2 alone can not be eliminated from the body and the same holds true for H2O. Ammonia is highly toxic, out is not found in free NH3+ form, thus it is immediately converted to non-toxic form.
