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2026新七下生物教案|《人的生殖》

  • 2026-05-14 10:08:41
2026新七下生物教案|《人的生殖》

2026新七下生物教案｜《人的生殖》

❗️❗️【新七下生物备课】❗️❗️📃章节：人教版七下4.1.1《人的生殖》，备课超省心！！点击下方拿走直接用👇👇👇

点我购买：新七下生物课件，配教学视频、教案和逐字稿，送小纸条

一、复习回顾，导入新课👀
教师讲解：人类新个体的产生，要经历雌雄生殖细胞结合，在母体内完成胚胎发育，再由母体产出的过程，这一过程主要是靠生殖系统来完成的。每个正常人都有生殖系统，但是男性和女性的生殖系统不一样，这是男性和女性在身体结构上最大的差别。

二、生殖系统
教师引导学生对照图片，了解生殖系统各部分结构并讲解。

三、生殖过程
教师补充讲解：到了胚胎发育的中后期，卵黄内的营养被消耗完了。这个时候营养就来源于母体了。胎儿生活在子宫内的液体，羊水中，通过胎盘和脐带从母体获得生长发育所需要的营养物质和氧，胎儿进行生命活动所产生的二氧化碳及其他代谢废物，也是通过胎盘和脐带经母体排出。胎盘内有许多绒毛，绒毛内有毛细血管，这些毛细血管呢，与脐带内的血管是相通的，绒毛与绒毛之间充满了母体的血液。胎儿和母体就是通过胎盘上的绒毛进行物质交换的。

文案仅展示部分教案内容，图片已展示完整版教案

#初中生物 #七下生物 #初中生物备课#教案 #人的生殖 #七下生物新教材 #初中生物老师 #教学设计 #夏夏老师生物课件 #教师必备

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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:0.001163s ] mysql:host=127.0.0.1;port=3306;dbname=a_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001673s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000783s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000677s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001293s ]
  6. SELECT * FROM `set` [ RunTime:0.000611s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001547s ]
  8. SELECT * FROM `article` WHERE `id` = 492102 LIMIT 1 [ RunTime:0.001045s ]
  9. UPDATE `article` SET `lasttime` = 1779285595 WHERE `id` = 492102 [ RunTime:0.003001s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.000601s ]
  11. SELECT * FROM `article` WHERE `id` < 492102 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000972s ]
  12. SELECT * FROM `article` WHERE `id` > 492102 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001169s ]
  13. SELECT * FROM `article` WHERE `id` < 492102 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001821s ]
  14. SELECT * FROM `article` WHERE `id` < 492102 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.001641s ]
  15. SELECT * FROM `article` WHERE `id` < 492102 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001801s ]
0.244744s