静脉瓣的作用是防止血液倒流。学生对此缺少感性认识。由于标本难以采集，拇指挤压四肢静脉的演示也有局限性，所以它既抽象又晦涩，教学效果不尽如人意。为此我们设计和制作了静脉瓣作用演示教具。该教具制作简单，使用方便，效果显著。不仅帮助学生直观地理解静脉瓣的作用， The role of venous valves is to prevent blood backflow. Students do not have a sensuous understanding of this. Because the specimen is difficult to collect, the demonstration of the thumb compressing the veins of the extremities has limitations, so it is both abstract and obscure, and the teaching effect is not satisfactory. For this purpose, we designed and produced a vascular valve demonstration teaching aid. The teaching aids are simple to make, easy to use, and effective. Not only helps students intuitively understand the role of venous valves,