草履虫是原生动物门的代表，而原生动物是动物界中最原始、最低等的一类，在动物进化史上占有重要 位置。因此草履虫的结构不仅重要，而且具有代表性。但它形态小，人的肉眼看不见，在教学时要想给学生以感性认识，让学生轻松的掌握草履虫的结构，需借助显微镜。因此显微 Paramecium is representative of the protozoan door, and protozoa is the most primitive, lowest class of animal kingdom, occupies an important position in the history of animal evolution. Therefore, the structure of Paramecium is not only important, but also representative. However, its shape is small, the naked eye can not see, in teaching to want to give students a sense of perceptual, allowing students to easily grasp the structure of Paramecium, the need to use the microscope. So microscopic