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2026新七下生物教案丨《血流的管道-血管》

  • 2026-05-08 18:16:11
2026新七下生物教案丨《血流的管道-血管》

2026新七下生物教案丨《血流的管道-血管》

❗️❗️【新七下生物备课】❗️❗️📃章节：人教版七下4.4.2《血流的管道-血管》，备课超省心！！点击下方拿走直接用👇👇👇

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❗️❗️【七下生物备课】
📜章节：人教版七下4.4.2《血流的管道-血管》

一、创设情境，导入新课🧐
教师出示“想一想，议一议”中的情境并提问：当人体因创伤出血时，有时血液只是少量的渗出，有时是缓慢地流出暗红色的血液，最为严重时则会喷射出鲜红色的血液。为什么会有不同的出血情况呢？

二、观察小鱼尾鳍内血液的流动🐟
请同学们阅读课本 111-112 页实验探究部分的内容，了解实验目的、材料用具及方法步骤。
教师讲解实验目的及实验材料:1.观察血液在血管内的流动。2.尝试分辨血管的种类以及血液在不同血管内的流动情况。

三、血管的类型及功能🔗
❤️动脉
教师出示图片并讲解动脉血管的概念：动脉是把血液从心脏送到身体各部分去的血管。
教师提问：动脉血管有什么结构特点?
教师补充：在的身体里，与心脏相连的动脉是最粗的，如图中的主动脉、肺动脉，远离心脏后，这些动脉血管会不断分支变细，管径也由大变小，最小的叫小动脉，小动脉再分支就形成了毛细血管。

✅文案仅展示部分教案内容，图片展示完整版教案
#初中生物 #初中生物备课 #生物 #生物老师备课 #血流的管道血管 #教案 #教学设计 #七下生物 #初中生物老师 #夏夏老师生物课件

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  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:0.000811s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001220s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000564s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000548s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001276s ]
  6. SELECT * FROM `set` [ RunTime:0.000543s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001421s ]
  8. SELECT * FROM `article` WHERE `id` = 501111 LIMIT 1 [ RunTime:0.000928s ]
  9. UPDATE `article` SET `lasttime` = 1778387388 WHERE `id` = 501111 [ RunTime:0.001470s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000509s ]
  11. SELECT * FROM `article` WHERE `id` < 501111 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000958s ]
  12. SELECT * FROM `article` WHERE `id` > 501111 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000768s ]
  13. SELECT * FROM `article` WHERE `id` < 501111 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001911s ]
  14. SELECT * FROM `article` WHERE `id` < 501111 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.012910s ]
  15. SELECT * FROM `article` WHERE `id` < 501111 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.007094s ]
0.154788s