教师通过引导学生观察哺乳动物肺的实物标本,使学生认识呼吸系统的结构特点,体会“结构与功能相适应”的观点;同时抓住关键问题,引导思考、分析,使学生在事实基础上逐步形成相关概念。最后,还介绍了雾霾的危害,呼唤同学们共同努力,为更长久的“蓝天”做出自己的贡献。 By guiding students to observe the physical specimens of mammalian lungs, teachers can make students understand the structural features of the respiratory system, understand the viewpoints of “structural and functional adaptation”, grasp key issues and guide thinking and analysis, Gradually formed on the relevant concepts. Finally, it also introduces the dangers of haze, calling on students to work together to make their own contribution to the longer “blue sky”.