2022年2018济南版生物七年级上册2.2.1.3《无脊椎动物的主要类群》教案 .pdf

名师精编优秀教案生物圈中的动物2.2.1.3 无脊椎动物的主要特征一、教学目标1、说出软体动物和节肢动物常见的动物。2、认识蝗虫的形态结构以及与其生活习性相适应的特点，掌握节肢动物的主要特征。二、课时安排1 课时三、教学重点1、软体动物、节肢动物的主要特征2、蝗虫的形态结构以及与其生活习性相适应的特点四、教学难点如何初步确立生物体结构与功能相适应的观点。五、教学过程（一）导入新课复习提问：1、腔肠动物、扁形动物、线形动物和环节动物的主要特征分别是什么？2、怎样区分蚯蚓的前后端？这节课我们介绍下软体动物和节肢动物的主要特征。（二）讲授新课探究一：软体动物的主要特征阅读教材 75 76 页文字资料，思考：1.河蚌的运动器官是什么？名师精编优秀教案2.河蚌是如何进行呼吸的？3.贝壳是怎么形成的呢？4.软体动物都有贝壳吗？5.软体动物的主要特征是什么？探究二：节肢动物的主要特征阅读教材 77 79 页文字资料，思考：1、蝗虫的身体分为哪几部分？2、蝗虫的足、出教材、翅各有何特点？3、气门有何作用？4、外骨骼有何则用？5、节肢动物的主要特征是什么？（三）知识运用1节肢动物的体表有坚硬的_，限制了身体的生长，所以节肢动物一般都有_现象2柔软的身体表面有外套膜，大多具有贝壳，运动器官是足，下列符合上述特征的动物类群是（）A腔肠动物B软体动物C线形动物D节肢动物（四）归纳小结一、软体动物的主要特征文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 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页鱼、两栖动物和爬行动物鱼的主要特征两栖动物的主要特征爬行动物的主要特征八、教学反思文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 ZP2J2X7G2A3文档编码:CW10A5V1N2Y3 HH7B3R9I8E8 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