Respiration, Respiratory System and Its Disorders
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Oxygen is essential to support life. We breathe in air in order to take oxygen and breathe out to expel the waste gas which is carbon dioxide, a by-product of respiration. Breathing enables air containing oxygen to be taken into the lungs so that the oxygen can be transferred to the blood and circulated throughout the body. This action of breathing and the exchange of oxygen and carbon dioxide inside the lungs and within the cells throughout the body is commonly described as Respiration.Respirat...
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