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蚯蚓是常见的环节动物,它的身体呈长圆筒形,由许多相似的环形体节组成,全身无骨骼,肌肉发达,无专门的运动器官,仅依靠自身肌肉和身体腹面的刚毛配合完成运动。人教版八年级《生物》“线形动物和环节动物”一节安排了蚯蚓的观察实验,要求学生通过实验认识蚯蚓的形态特征。但由于蚯蚓身体较小,学生很难清楚地观察并正确理解蚯蚓刚毛与肌肉配合而产生运动的结果。因此,笔者利用身边的小材料,巧妙制作了一款立体感强、可视度高、动态的“蚯
Earthworm is a common part of the animal, its body is long cylindrical, composed of many similar annular body section, the body without bone, muscular, without specialized organs, just rely on their own muscles and body with the bristles to complete the exercise. PEP eighth grade ”biology“ ”linear animals and link animals“ section arranged an observation experiment of earthworms, require students to experimentally recognize the morphological characteristics of earthworms. However, due to the small earthworm body, students can not clearly observe and correctly understand the earthworm bristles and muscles with the result of exercise. Therefore, I use the small materials around, cleverly produced a strong sense of three-dimensional, high visibility, dynamic ”earthworm