Why Do We Need Oxygen?

Answer

We need oxygen because the main use of oxygen in humans and aerobic organisms is to permit the body to build energy. Energy is required as a host of processes in the body like movement, growth, repair, nerve conduction. Energy can be added from carbohydrates fats as well as amino acids but they need to be oxidised.
Q&A Related to "Why Do We Need Oxygen"
The main use of oxygen in humans and aerobic organisms is to allow the body to make energy. Energy is needed a host of processes in the body e.g. growth, repair, movement, nerve conduction
http://wiki.answers.com/Q/Reasons+you+need+oxygen
An oxygen sensor is a electronic device used to measure the oxygen level contained in your car's exhaust gases. Your car's ECU, or engine computer unit, requires these measurements
http://www.ehow.com/facts_7186043_do-need-oxygen-s...
Humans and all mammals are aerobes, which means they require oxygen for respiration. Oxygen is
http://www.chacha.com/question/why-do-we-need-oxyg...
I can primarily think of three main deterrents as to why oxygen is the only viable alternative. This comes down to. Physical state. Electronegativity. Toxicity. Under standard conditions
http://www.quora.com/Why-do-we-have-to-breathe-oxy...
2 Additional Answers
We human beings and living creatures need oxygen for survival. It is vital to our ability to breathe. It is vital to all creatures on this planet.
We need oxygen to live. In other words our bodies need oxygen to carry on the processes that enable us to do what we do everyday. The red blood cells carry oxygen to all parts of our bodies. Without this oxygen our bodies could not metabolize food and do other important functions.
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