We often confuse respiration with breathing. Breathing is a gas exchange process by which we take in oxygen with each inhale and release carbon dioxide with each exhale. This is a physical process which takes place continuously from the time of birth till the time of death. When this process is absent except at the time of death, it is regarded as APNOEA.
Vertebrate animals living on land all have lungs so that when the muscle below our rib cage (called diaphragm) is pulled down, air gets sucked into our lungs and oxygen in the inhaled air is exchanged for carbon dioxide from our body which is then exhaled when the diaphragm bows upwards.
Respiration is a biochemical process by which all living things obtain energy by combining oxygen and glucose to form energy in the form of ATP, carbon dioxide and water. Oxygen obtained by vertebrate animals in the process of breathing is utilised in carrying out the biochemical process called respiration.
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