新编写的初中《动物学》教材内容丰富,有利于加强中学生的动物学基础知识。但教材中有些内容不易理解和掌握,现对有关问题补充如下: 1.文昌鱼是新编的内容,过去课本中没有讲过。教材第99页“文昌鱼在身体头端腹面有口,口的周围生着几十条触须……,在身体的尾端的腹面有肛门”。实际上,文昌鱼身体前端(它没有真正的头部,所以还是说前端较好)腹面不是口,而是膜状的口笠。口笠有口笠触手,口笠包围的空腔为前庭,前庭壁上有轮器。前 Newly written junior high school “zoology” teaching material is rich in content, is conducive to strengthening the basic knowledge of zoology secondary school students. However, some of the contents of the textbooks are not easy to understand and master. We now add the following questions to the relevant questions: 1. The amphioxus is a newly edited content that has not been mentioned in the textbooks in the past. Textbook Page 99 “Amphiox has a mouth on the ventral surface of the body, with dozens of tentacles around the mouth ..., and an anus at the ventral surface of the body.” In fact, amphioxus body front (it does not have a real head, so it is better to say that the front end) ventral surface is not the mouth, but the film-shaped hats. Mouth hat has a tentacle hat, hatched mouth cavity for the vestibule, vestibule wall of the wheel. before