Question

what is the importance of O2 in human body?

Answer 1

it helps in oxidising the food in the process of cellular respiration
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Answer 2

Oxygen i. e. O2 in human body is very important for Respiration.

Respiration means inhaling oxygen and exhaling Carbon dioxide
The Function of Oxygen in the Body. Cellular respiration is the term used to describe the phase of the digestive process when food breaks down to supply cells with energy. During cellular respiration, cells use oxygen to break down sugar to produce ATP, or adenosine triphosphate.

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