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呼吸生理简述呼吸系统的主要生理功能是保证人体从外环境吸收代谢所消耗的O_2,排出氧代谢的产物CO_2。肺循环与外环境的气体交换称外呼吸;体循环与组织细胞之间的气体交换称内呼吸。了解这一生理过程,对探索呼吸疾患的发病机理和病理生理,以明确诊断,正确掌握人工通气机的使用及进行合理氧疗都是十分重要的。本文简述外呼吸过程肺功能的各个环节。 1 肺容积(Iung volume)及其组成附图肺容量及其组成肺容积反映外呼吸的空间,是呼吸道与肺泡的总容量,肺容积的变化能产生通气,有了容积才可能有弥散面积。肺容积的大小变化,可藉肺量计描绘(附
Brief Description of Respiratory Physiology The main physiological function of the respiratory system is to ensure O_2 consumed by the human body from the absorption and metabolism of the external environment and to expel the product CO_2 of oxygen metabolism. Gas exchange between the pulmonary circulation and the external environment is called extra-respiratory; the gas exchange between the systemic circulation and the tissue cells is called internal respiration. To understand this physiological process, it is very important to explore the pathogenesis and pathophysiology of respiratory diseases so as to make a definite diagnosis, correctly understand the use of artificial ventilators and conduct reasonable oxygen therapy. This article outlines the various aspects of the lung function of the external respiration process. 1 lung volume (Iung volume) and composition chart lung volume and its composition lung volume reflects the space of the external breathing is the total capacity of the respiratory tract and alveoli, lung volume changes can produce ventilation, with the volume may have a diffusion area. The size of the lung volume changes, can be spilled by the spirometer (with