during respiration oxygen is used up in the body cells to produce energy
carbon IV oxide is produced as a by-product
the carbon IV oxide must be eliminated from the body
elimination is through the lungs
also, water vapour is formed and must be removed
this removal is through the lungs
the lung is therefore considered as an excretory organ as it removes carbon IV oxide and water vapour which are by-products of respiration
Mohaissack answered the question on October 5, 2017 at 14:16
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