They do not need other food, water, or even oxygen.

Your body needs oxygen to get or make energy from the food you eat.

So the question is: Which do we need more, oxygen or power?

It was all very simple: I needed oxygen, rest and water.

If you need oxygen at home, it is important to learn how to use and take care of your equipment.

Half an hour fighting that thing and one or the other of us won't need oxygen any more.

The baby needs extra oxygen for at least 28 days after birth.

Everyone knows that a fire needs oxygen to burn well.

This is a problem, because every part of the body needs oxygen to be healthy and to stay alive.

We need oxygen, she thought, and wanted to cough worse than ever.