Question

Why the percentage composition of oxygen is more than other bioelement in organism​

Answer 1

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Answer 2

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External respiration is the formal term for gas exchange. It describes both the bulk flow of air into and out of the lungs and the transfer of oxygen and carbon dioxide into the bloodstream through diffusion.Breathing (or ventilation) is the process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly by bringing in oxygen and flushing out carbon dioxide. ... The body's circulatory system transports these gases to and from the cells, where "cellular respiration" takes place.

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