Most animals including humans inhale oxygen and give off carbon dioxide. Can we say that oxygen is an exhaustible resource?
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Explanation:
It is taken to the heart and pumped into the cells. At the same time, the carbon dioxide waste from the breakdown of sugars in the cells of the body diffuses into the blood and then diffuses from the blood into the lungs and is expelled as we breathe out. One gas (oxygen) is exchanged for another (carbon dioxide)
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no because tree is made up of oxygen so tree is dead so oxygen is exhausted
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