Animal Physiology And Biochemistry, 2.physiology Of Respiration

Physiology of respiartionChapter 21257076-142277PHYSIOLOGY OF RESPIRATIONIntroduction : All the living organisms require energy to perform various activities of the life like growth, maintenance and reproduction. The food is the source of energy. The oxygen is essential to release the energy in the form of ATP from the food substances. In lower organisms, exchange of gases takes place through the diffusion mechanism. The respiratory system and Circulatory system plays an important role in supplying the oxygenated blood to the different parts of the body and also to eliminate the C02 from the body. i.e. it helps to regulate the pH of blood. The supply of energy in all living organisms is done through the intake of food. During respiration chemical energy trapped in the food is released in the form of ATP. It is utilized by the cells for their metabolic activities.Definition: The process in which an exchange of gases like 02 & C02 between the body and atmosphere (environment) is called respiration. ORThe process of oxidation of food molecules to liberate the energy in the form of ATP molecules called respiration.Respiratory organs :Lower invertebrates like