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It might be better to ask what is the function of respiration; not all biological activities are consciously purposeful, as the term goal implies. In any event, respiration performs the function of gaseous exchange. It gets rid of unwanted gases and acquires needed gases. In human beings, the unwanted gas is carbon dioxide, and the needed gas is oxygen. In green plants, oxygen is the unwanted gas and carbon dioxide is needed.

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15y ago

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