3why is oxygen important for all body cells?

it is involved in sugar production

it reduces the amount of urea in blood.

it increases the formation of lactic acid.

it is involved in energy producing cycles.

We breathe because oxygen is needed to burn the fuel sugars and fatty acids in our cells to produce energy. Oxygen is brought into the lungs via breathing, where it is transported by red blood cells to the entire body to be used to produce energy.