中学同学和大学一年级同学都一样,在刚学生物的时候,对于“细胞是立体的”这样—个概念,很是模糊,想不通。同时,再加以平时讲课,实验所看到的挂图和切片,都只见到细胞切面上的一个平面,因此,总认为细胞是扁平的。这样,就往往影响他们对整个有机体及细胞结构的观察、了解和认识。譬如:在切片中同学看到有的细胞核圆圆地在细胞腔正中,有的则稍偏一点,有的紧挨着细胞侧壁,成长椭圆形,因而就产生了一大堆不解的疑问,其实,原因只不过是我们观察它的角度不同而得出不同的形态罢了,因为细胞是一个多面的立体的东西。再多讲,概念也总还 Secondary school students and first-year university students are the same, just learning the material, for the “cell is three-dimensional” so a concept, it is vague, can not figure out. At the same time, in addition to the usual lectures, the experimental charts and slices saw only one plane on the cell section, so the cells were always considered as flat. In this way, they often affect their observation of the entire organism and cell structure, understanding and understanding. For example: Students in the slice to see some of the nuclei are round in the middle of the cell cavity, while others are slightly biased, and some close to the cell wall, the growth of oval, which resulted in a lot of puzzled questions In fact, the reason is only that we observe it in different perspectives and come in different forms, because the cell is a multi-faceted three-dimensional thing. Say more, the concept is also always