Why do we breathe oxygen? how do we get energy out of our food?

2 answers:

4 0

Out body breaks down food with enzymes and the glucose produced is burned to form energy measured in calories.

we breathe in oxygen to help our muscles function

lapo4ka [179]3 years ago

3 0

We breath oxygen because it is needed to burn fuel [ sugars and fatty acids] in our cells to produce energy. Oxygen is also brought into the lungs via breathing; where it is transported by red blood cells to the entire body to be used to produce energy. The food we eat gives us protein, sugars, vitamins etc. for energy

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