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1、名师精编优秀教案生物：1.4 鸟的生殖和发育教案2（人教版八年级下)课题鸟类的生殖和发育第 1 课时教学目标说出鸟卵适于在陆地上发育的特点和描述鸟的生殖和发育过程教材分析重点说出鸟卵适于陆地上发育的特点难点通过本节所学习的内容，总结鸟类比两栖类等动物的进步之处教具粉笔、黑板、投影片复习引入问题引入：“鸟为什么能够在空中自由自在的飞翔？人能像鸟一样飞翔吗？”名师精编优秀教案教学过程师：绝大多数的鸟都能飞翔。鸟为什么能飞呢？也许你会回答：因为鸟有翅膀，那么在人的双臂上缚上人工的翅膀，人能不能像鸟一样飞翔呢？生：不能，因为鸟能飞翔的原因不仅仅是因为它有翅膀，同时还有发达的胸肌；而人为的安上一个翅膀并
2、不具备上述的两个条件，所以不能飞翔。师：我们在上学期已经学习过鸟的一些相关知识，今天我们来继续探讨一下鸟类的生殖和发育又是怎样的。师：我们大家都知道，鸟是通过卵孵化出来的，那是不是市场上或者养鸡场里的鸡蛋都能孵出小鸡呢？下面我们就来找找答案，看究竟哪些鸡蛋能孵出小鸡。请同学们认真阅读课本P16-17 的“观察与思考”，回答以下问题：问题 1：鸡卵的结构包括哪几部分？问题 2：鸡卵的各组成部分分别有什么功能？生 1：鸡蛋普遍都是一头钝、一头尖，在钝端去掉卵壳和外膜以后，卵壳下面有一个空腔。把鸡蛋去壳后，我们发现卵白和卵黄几乎占据了整个鸡蛋的空间。生 2：我们发现在卵黄表面中央有一盘状的小白点。而
3、且卵黄的两端还有两条带状物质。生 3：我们认为卵黄是卵细胞的主要营养部分，卵黄外面的卵白，也含有营养物质和水分，以供胚胎发育所需。文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5
4、D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW
5、4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O
6、3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z
7、10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6
8、E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 H
9、T6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I
10、10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3名师精编优秀教案教学过程师：大家观察得非常仔细。鸟卵上的小白点叫做胚盘，里面含有细胞核。胚盘是进行胚胎发育的部位。胚盘、卵黄和紧包在卵黄外面的卵黄膜共同构成了卵细胞。而卵黄外面的这两条长长的带状物质，我们称之为系带。师：经过刚才的观察，大家对鸟卵的结构也有了一点的了解，那么现在请同学们结合已学的知识，根据课本P18的图 VII-8（鸟类繁殖过程中的一些行为），尝试归纳出鸟类的生殖和发育过程。生：鸟类有很多繁殖行为，一般包括求偶、交配、筑巢、产
11、卵、孵卵和育雏等几个阶段。师：在学习完鸟类的生殖和发育以后，结合以前所学习过的有关知识，我们能否总结出鸟类比起两栖类、爬行类有哪些方面的进步呢？生 1：鸟类具备了较完善的繁殖方式和行为，保证了后代有较高的成活率，并且脱离了对水环境的依赖。生 2：鸟类还可以借助翅膀来进行飞翔，当外界环境比较恶劣的时候，可以通过迁徙来适应环境。师：在鸟类中，还有一动物演化史上极为重要的进步性事件，那就是它的体温是生：恒定。师：鸟类和哺乳类都是恒温动物，恒温动物具有较高而稳定的新陈代谢和调节产热、散热的能力，从而使体温保持在相对恒定的水平。文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T
12、1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10
13、 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S
14、6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G
15、5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:C
16、W4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10
17、O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2
18、Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3名师精编优秀教案课时小结本节课我们在以前学习的基础上
19、，进一步了解了卵的结构，继而有学习了有关鸟类的生殖和发育。布置作业教学后记文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O
20、3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z
21、10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6
22、E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 H
23、T6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I
24、10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编
25、码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3文档编码:CW4Q8I10G5D4 HT6S6M4L6E10 ZY2Z10T1X10O3