The respiration which uses oxygen or air is called aerobic respiration. It is called aerobic because it uses air which contains oxygen (‘aerobic’ means ‘with air’). In aerobic respiration or air use respiration, the glucose food is completely broken down into carbon dioxide and water by oxidation. This respiration produces a considerable amount of energy for use by the organism which get stored in the ATP molecules. The breaking down of glucose (food) during aerobic respiration (which is carried out by most of the organisms) can be represented as follows :
Glucose ———-> Pyruvate ——————-> 6CO2 + 6H2O + 38ATP(1 molecule) Glycolysis (2 molecules) Oxygen Carbon dioxide Water Energy
Please note that during aerobic respiration (shown above), 1 molecule of glucose (food) produces 38 energy-rich ATP molecules. All the organisms like humans, Birds, insects etc, which obtain energy by aerobicrespiration, cannot live without oxygen (of air). This is because if there is no oxygen or no air in the surrounding, they cannot get energy from the food which they eat. Mitochondria are the sites of aerobic respiration in the cells.
The energy released during this respiration is used by the organism. Most of the living organisms carry out this respiration (by using oxygen of air). For example, humans (man), dogs, cats, lions, elephants, cows, buffaloes, Goad, deer, Birds, lizards, snakes, earthworms, frogs, fish, and insects (such as cockroach, grasshopper, house flies, mosquitoes and ants, etc.) and most of the plants carry out this type of respiration by using oxygen of air (to obtain energy).