《测量呼吸和心跳》PPT课件.ppt

测量呼吸和心跳,苏教版科学（五年级上册）,第4单元呼吸和血液循环,怎样测量呼吸？,所谓呼吸，指一呼一吸才算是一次呼吸。请大家静静地坐好，我们可以将手放到上腹部，当感觉到自己的腹部鼓起来又瘪进去一次，这就是一次呼吸。,测量并算出1分钟的呼吸和心跳次数及平均值,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,19,20,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,计时开始,时间到！,自测呼吸次数,伸出自己的左手，掌心朝上，右手的食指、中指、无名指三指并拢，将指肚部位放在左手手腕外侧，大拇指自然的放在手背附近，稍稍用力，这时，中指就可以感觉到脉搏的跳动了。,怎样测量心跳？,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,19,20,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,时间到！,计时开始,自测心跳次数,小游戏,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,19,20,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,时间到！,测量运动结束时的呼吸和心跳,计时开始,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,19,20,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,时间到！,测量运动结束时的呼吸和心跳,计时开始,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,19,20,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,时间到！,计时开始,测量休息后的呼吸和心跳,60,59,58,57,56,55,54,53,52,51,50,49,48,47,46,45,44,43,42,41,40,39,38,37,36,35,34,33,32,31,30,29,28,27,26,25,24,23,22,21,19,20,18,17,16,15,14,13,12,11,10,9,8,7,6,5,4,3,2,1,0,时间到！,计时开始,测量休息后的呼吸和心跳,分析数据并完成柱形图,结论：运动后呼吸的次数增加了，心跳的次数也增加了；休息一会儿，呼吸和心跳的次数都减少了。,小组内分析：收集到每个同学的数据有什么共同的地方？有什么不同的地方？,因为人在运动时所消耗的能量比平静时要多很多，所以呼吸和心跳的次数都会比平时增加。每个人的身体素质不同，所能承受的