Why do we require oxygen?
To store energy in the form of food
To convert water into usable form
To break down food and release energy
To destroy dead cells
The primary reason why all living things need oxygen is to break down (or “burn”) food to release its stored energy to perform various life processes.
The process of intake of oxygen to burn down food chemically and to release energy in the body is known as:
The cellular process of breaking down food to release energy is known as _____ .