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Respiration is the movement of oxygen and carbon dioxide between the environment and the cells in tissues. Learn about the physiological and biochemical definitions, mechanisms, types, and medical aspects of respiration.
Cellular respiration is the process of converting nutrients into energy (ATP) and waste products in the cells of living organisms. It can be aerobic (using oxygen) or anaerobic (using other electron acceptors), and involves glycolysis, Krebs cycle, and electron transport chain.
Real-time magnetic resonance imaging of the human thorax during breathing X-ray video of a female American alligator while breathing. Breathing (spiration [1] or ventilation) is the rhythmical process of moving air into and out of the lungs to facilitate gas exchange with the internal environment, mostly to flush out carbon dioxide and bring in oxygen.
Respiration is a term that can refer to various biological, ecological or entertainment topics. Learn about the different types and processes of respiration, such as cellular, respiratory, aquatic, artificial and carbon respiration.
Bioenergetics is the study of how living organisms acquire and transform energy for biological work. Learn about the types of reactions, the role of ATP, and the examples of major bioenergetic processes such as glycolysis, photosynthesis, and oxidative phosphorylation.
Fish exchange gases using gills on either side of the pharynx, forming the splanchnocranium. The gills are tissues with threadlike filaments that have many functions and are involved in ion and water transfer as well as oxygen, carbon dioxide, acid and ammonia exchange.
The respiratory system is a biological system for gas exchange in animals and plants. It consists of specific organs and structures, such as lungs, airways, gills, or stomata, that vary depending on the size, environment, and evolution of the organism.
Oxygen is a highly reactive nonmetal and an oxidizing agent that forms oxides with most elements and compounds. It is the most abundant element in Earth's crust and the third-most abundant in the universe, and it is essential for cellular respiration in living organisms.