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初级中学生理卫生课第七章第二节讲过“消化系统的结构和功能”后,安排了用放大镜观察猪或羊的小肠绒毛的分组实验内容。河南省商水县实验中学陈思明老师在该实验指导方法的基础上予以改进。他用解剂剪截取5～7cm长的猪小肠一段,翻过来,使小肠内表面向外,用清水冲洗干净,用镊子夹住洗净的小肠
After the second section of the seventh chapter of the junior high school physiology hygiene course talked about “the structure and function of the digestive system”, a group experiment was arranged to observe the villus of the small intestine of the pig or sheep with a magnifying glass. The teacher Chen Siming of Experimental Middle School in Shangshui County, Henan Province, improved the experimental method. He took a section of pig’s small intestine that was 5 to 7cm long with a dispersant and turned it over so that the inner surface of the small intestine was flushed out with water, and the washed small intestine was clamped with tweezers.