Respiration differs from combustion in

Respiration differs from combustion in the Liberation of energy gradually in steps in contrast to combustion.
Respiration is the movement of oxygen from the outside environment to the cells within tissues and the removal of carbon dioxide in the opposite direction that's to the environment.
Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer.