Why do we need oxygen

Why do we need oxygen

Our survival depends on oxygen. Oxygen is one of the most vital elements, the lack of which is immediately felt by us. Not just humans but all other animals, birds, amphibians and fishes also need oxygen for their survival. The most vital function of oxygen is that it provides us with energy. The food we eat gets digested in our stomach. After digestion the food transforms into simpler substances from complex compounds. The digested food then is transported to each of our body cells. But without oxygen the food that reaches our body cell will be useless.

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