Asked by gunjansingh | 28th May, 2009, 11:33: AM

Expert Answer:

In cellular respiration, oxygen is required to break down the complex organic substances (like glucose) obtained from food through digestion, in order to release the energy present in them. This energy is stored in the form of ATP and used whenever needed by the body for carrying out the various life processes.

Answered by  | 28th May, 2009, 10:52: PM

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