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Lower Respiratory Passageways and Lungs
The pharynx conducts air into the trachea, a tube
reinforced with C-shaped rings of cartilage(软骨) to prevent its
The smallest of the conducting tubes, the bronchioles( 细支气管), carry air into the microscopic air sacs, the aveoli(肺泡), whrough which gases are exchanged between the lungs and the blood.
Medical Terminology(3)
The Respiratory System 呼吸系统
刘帅
研究生英语教研室(综合楼110)
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Introduction of the Respiratory system
The main function of the respiratory system is to provide oxygen to body cells for energy metabolism and to eliminate carbon dioxide, a byproduct of metabolism. Because these gases must be carried to and from the cells in the blood, the respiratory system works closely with the cardiovascular system to accomplish gas exchange.