Oxygen is a colorless, odorless and tasteless gas. Air is made up of approximately 21% oxygen, so you have been breathing oxygen all your life. It is simply now going to be supplied to you in concentrations higher than the 21% found in the air. It can be supplied in this more concentrated form from Oxygen Tanks of various sizes, by an Oxygen Concentrator or from a Liquid Oxygen System. Each of these three sources of oxygen has different unique advantages. Your doctor has chosen the best one for you.
We all need oxygen. Our body cells require energy to function. These cells get their energy from a combination of the food we eat and the oxygen we breathe. It is much like the process of burning fuel. Food is the fuel, but it will only burn and produce heat or energy in the presence of oxygen.
The energy produced from this process enables our bodies to function, allowing us to move, to walk, to think, to breathe and to carry out all other bodily functions.