呼吸系统的疾病大多是常见病、多发病。要掌握其发生、发展规律,更好地预防和治疗,了解呼吸系统的生理功能是十分必要的。大家都知道,人体各部的组织、细胞时刻进行着新陈代谢,不断地消耗氧气和产生二氧化碳。那么,组织细胞是怎样获得氧气和排出二氧化碳的呢?这是依靠呼吸系统和血液循环系统的共同活动来完成的。 Respiratory diseases are mostly common and frequently-occurring diseases. To master its occurrence, development, better prevention and treatment, to understand the physiological function of the respiratory system is very necessary. As we all know, the organization of the various departments of the body, the cells are constantly undergoing metabolism, constantly consume oxygen and produce carbon dioxide. So, how do cells get oxygen and emit carbon dioxide? This is done by the common activities of the respiratory and circulatory systems.