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Discover how changes in lung volume affect air pressure, leading to the movement of air molecules in and out of the lungs. This process, crucial for respiration, is explained using a simple jar analogy. Rishi is a pediatric infectious disease physician and works at Khan Academy. Created by Rishi Desai. Questions.
Breathing is a vital process that allows our bodies to take in necessary oxygen and expel waste carbon dioxide. Air enters through the nose or mouth, journeys down the throat, and reaches the lungs via tubes called bronchi.
Incorrect: The respiratory system works alone in transporting oxygen through the body. Correct : The respiratory system works directly with the circulatory system to provide oxygen to the body. Oxygen taken in from the respiratory system moves into blood vessels that then circulate oxygen-rich blood to tissues and cells.
Respiratory failure is a condition in which the level of oxygen in the blood becomes dangerously low or the level of carbon dioxide in the blood becomes dangerously high. Conditions that block the airways, damage lung tissue, weaken the muscles that control breathing, or decrease the drive to breathe may cause respiratory failure.
17 de may. de 2018 · A meta-analysis shows significantly higher mortality with liberal use of supplemental oxygen in acutely ill patients. Supplemental oxygen can be a life-saving intervention for patients with hypoxemic respiratory failure; however, emerging evidence suggests that too much oxygen is harmful ( NEJM JW Gen Med Dec 1 2016 and JAMA 2016; 316:1583).
29 de jun. de 2006 · However, in acute and chronic ventilatory failure, oxygen supplementation is essential to maintain adequate delivery of oxyhaemoglobin to organs such as the heart, kidneys, and brain. Many patients who are chronically hypoxic are able to cope satisfactorily with an oxygen saturation of arterial blood of around 90%.
