Respiratory System in Vertebrates
Every cell in a living organism oxygen (O²) during oxidation of substances resulting in the release of heat and energy and production of carbon dioxide (CO²). This CO² acts as a poison for protoplasm unless removed from the body . The term respiration is used in several senses. According to a simple definition , it means intake of O² and getting rid of CO² by a living organism. The system designed for gases(O² and CO²) between the organism and its environment is termed the respiratory system. Respiratory Organs - Exchange of O² and CO² in an organism takes place in two locations. During internal respiration, also termed cellular or tissue respiration, gaseous exchange occurs between blood and tissue or cells of the body. During external respiration , gaseous exchange takes place between blood and the external environment . Blood serves as a transportation medium for carring O² and CO² away from the body cells . The body structure which are needed for gaseous exchange between the blood...