Why is oxygen so important?

Oxygen can be processed to produce energy. Your body does it, cars do it and so does fire. Oxygen contains a lot of energy and aids lots of chemical reactions, and it contributes most of the energy our bodies use.

Body cells take oxygen and it convert body neutrant in to various useful material required for our body,Such as it convert fat into energy.It also makes tissues for our body. oxygen is necessary for breathing purpose. Through lungs,it clearify the blood and remove the toxic material from blood