Why do we need oxygen?

Answer 1

The main purpose of oxygen in humans and other aerobic organisms is to allow the body to make energy. Energy is needed for a host of processes in the body such as growth, repair, movement, nerve conduction, etc., and can be gained from numerous sources, like carbohydrates, fats, and amino acids. However, for the body to use this energy, it must be oxidized. A molecule that is undergoing oxidation loses electrons, which store the electric and kinetic energy that the human body will use once absorbed. What this means is that when people breathe in oxygen, they can activate the latent energy that might have consumed before.

Answer 2

Oxygen doesn't help us breathe, it's why we breathe; oxygen is needed by every cell in the body as part of cellular respiration, which is how the body produces its internal energy; we breathe to take oxygen into the body, & without it we would be dead.

Answer 3

We don't need oxygen to breath we need oxygen to live. We can breath in an atmosphere that doesn't have oxygen but we won't live long.

Oxygen is essential for aerobic respiration which is the process we use to utilise food energy

Answer 4

You need energy to handle the problems. You have biological oxidation to to facilitate the same. It is not possible to have oxidation with out the oxygen in your body.

Answer 5

Life exists because of oxygen.