Why Oxygen is Required for Human Life
(Animations)
Background Info
Oxygen (O2) is required by the body’s cells to transfer energy from nutrient molecules to ATP (adenosine triphosphate) in a process called aerobic respiration.
Basic Role of Oxygen

Oxygen (O2) is required by the body’s cells to transfer energy from nutrient molecules to ATP (adenosine triphosphate) in a process called aerobic respiration.