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第四章呼吸系统前二章学生已经了解人体在运动或其他活动中,都需要氧气和养料。这些养料(蛋白质、脂肪、碳水化合物)必需不断的分解和氧化,同时在分解和氧化的过程中释放出能。才能使各器官活动和保持体温。在氧化过程中也产生二氧化碳。那么氧化过程中的氧从何处取得呢?二氧化碳又排到何处去呢?这是本章要解决的主要问题。是阐明生理卫生中最基本的重要概念之一——新陈代谢中的一个主要环节. 本章教材中进一步加深对人体是一个统一整体概念的形成,例如肺每分钟的换气量是同肌肉活动的强度有着密切的联系。本章教材中还贯彻了人体构造与机能的统一关系。例如肺的体积不大,但却与气体有着很大的接触面积,以及分布丰富的血管;呼吸道的构造是适合于呼气与吸气,消除尘埃等机能的。
CHAPTER 4 THE FIRST SECTION OF THE RESPIRATORY SYSTEM Students have come to understand that the body needs oxygen and nourishment for exercise or other activities. These nutrients (proteins, fats, carbohydrates) must be continuously decomposed and oxidized, releasing energy during decomposition and oxidation. In order to make the organ activities and maintain body temperature. Carbon dioxide is also produced during oxidation. So where do the oxygen from the oxidation process come from and where does the carbon dioxide go? This is the main issue to be addressed in this chapter. Is to clarify one of the most basic and important concepts in physiology and health, one of the main links in metabolism.Details of this chapter to further deepen the human body is a unified concept of the formation of a whole, for example, lung ventilation per minute is the intensity of muscle activity Have close contact The teaching materials in this chapter also carry out the unification of human body structure and function. For example, lung volume is not large, but with gas has a large contact area, and the distribution of rich blood vessels; the structure of the respiratory tract is suitable for expiratory and inspiration, to eliminate dust and other functions.