Respiration Respiration is a physical process in which living organisms take in oxygen from the surrounding medium and emit carbon dioxide. the term respiration is also used to refer to the liberation of energy, within a cell. from fuel molecules such as carbohydrates and fats. Carbon dioxide and water are the products of this process, which is sometimes called cellular respiration to distinguish it from the physical process of breathing. Small organisms of the kingdoms …showed first 75 words of 397 total…

…showed last 75 words of 397 total…lungs. Birds are mammals that do not respire like the other mammals. Birds have auxiliary air sacs in the body cavity, and also air spaces within certain bones, all of which connect with the lungs and act as aids to pulmonary respiration. If there were no respiration, blood would not circulate and that could cause suffocation of the tissues of the body. Therefore if there were no respiration, then animal life would not be possible.