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为公开课打造的生物课件,还有教案和任务单

  • 2026-06-27 22:55:36
为公开课打造的生物课件,还有教案和任务单

为公开课打造的生物课件，还有教案和任务单

适用年级和教材版本：《发生在肺内的气体交换》课件+教案+任务单_人教版生物七年级下册

🧨【课件内容介绍】

💐生物老师备课不用愁！这份人教版七年级下册《发生在肺内的气体交换》精品课件，紧扣教材重难点，兼顾课堂实操与中考衔接，直接拿来就能用。

课件分两课时设计，逻辑清晰、层层递进。第一课时聚焦肺与外界的气体交换，用深呼吸体验、胸围测量、膈肌 / 肋间肌模型实验，把抽象的呼吸运动变直观，学生轻松掌握 “呼吸肌收缩→胸廓扩大→肺扩张→吸气” 的完整逻辑，突破 “胸廓变化与吸气先后” 易错点。

🌸第二课时主攻肺泡与血液的气体交换，用生活扩散实例、气体成分对比表，讲清气体扩散原理；结合肺泡三大结构特点，配套示意图拆解氧气与二氧化碳交换路径，贴合教材黑体字，考点一目了然。

课件亮点十足：双课时完整结构，含导入、实验、小结、习题全环节；模拟实验材料明确，小组合作易开展；中考真题同步练，对接考点不跑偏；核心素养全覆盖，兼顾生命观念、科学思维与健康习惯引导。

💮从课堂互动到课后巩固，从基础讲解到能力提升，一份课件搞定整节教学。排版简洁、重点突出，适配投影与线上授课，帮你节省备课时间，让气体交换知识不再抽象，课堂效率直接拉满。

#发生在肺内的气体交换#初中#生物#课件#教案#任务单#备课#公开课

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为公开课打造的生物课件,还有教案和任务单

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  138. /yingpanguazai/ssd/ssd1/www/a.sjds.net/vendor/topthink/think-template/src/template/contract/DriverInterface.php ( 0.86 KB )
  139. /yingpanguazai/ssd/ssd1/www/a.sjds.net/runtime/temp/97cad012e8e159aae2fe347a411e8351.php ( 12.06 KB )
  140. /yingpanguazai/ssd/ssd1/www/a.sjds.net/vendor/topthink/think-trace/src/Html.php ( 4.42 KB )
  1. CONNECT:[ UseTime:0.000709s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000860s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000338s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000273s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000667s ]
  6. SELECT * FROM `set` [ RunTime:0.000207s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000543s ]
  8. SELECT * FROM `article` WHERE `id` = 502936 LIMIT 1 [ RunTime:0.006788s ]
  9. UPDATE `article` SET `lasttime` = 1782767595 WHERE `id` = 502936 [ RunTime:0.012350s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000314s ]
  11. SELECT * FROM `article` WHERE `id` < 502936 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000506s ]
  12. SELECT * FROM `article` WHERE `id` > 502936 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000354s ]
  13. SELECT * FROM `article` WHERE `id` < 502936 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.008843s ]
  14. SELECT * FROM `article` WHERE `id` < 502936 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.013479s ]
  15. SELECT * FROM `article` WHERE `id` < 502936 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.009777s ]
0.122741s