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人教版高中生物必修三第一章第一节“细胞的生活环境”需要掌握的重点内容有:一是内环境概念;二是人体细胞如何与外界环境进行物质交换。但学生受诸多因素影响,往往难以理解相关知识。为此,笔者运用多媒体构建了人体细胞与外界环境进行物质交换的模型,受到了师生的欢迎。一、利用多媒体课件展示人体各种细胞生活的环境血浆与血清、组织液、淋巴液的概念是非常抽象的教学内容,虽然教师重点介绍了这部分液体存在
People’s Education Edition of high school biology compulsory three chapter first section “cell living environment ” need to grasp the key elements are: one is the concept of internal environment; the second is how human cells and the external environment for material exchange. However, students are affected by many factors, often difficult to understand the relevant knowledge. To this end, the author uses multimedia to build a model of the exchange of matter between human cells and the external environment, which is welcomed by teachers and students. First, the use of multimedia courseware to show the human body a variety of cell life environment Plasma and serum, tissue fluid, lymph fluid concept is very abstract teaching content, although the teacher focused on the existence of this part of the liquid