实验目的：
认识人体脉搏和心脏跳动是同步的。
实验器材：
人体脉搏跳动探究仪。
提出问题：
人体脉搏和心脏跳动是同步的吗？
猜想与假设：
人体脉搏和心脏跳动可能是有关系的。
实验过程及设计：（由学生自主设计或教师引导）
人体脉搏是和心脏跳动同步的。由于人体是一个封闭的“暗箱”，因此在教学过程中，无法使学生形象直观地观察到脉搏和心脏跳动为什么是同步的。本演示板从正面演示了挤压心脏的同时，脉搏也同时有了反应。由于仪器背面是用管道把心脏和脉搏连通，表现了由于有血管连通，所以，心脏跳动必然导致脉搏的同步运动。
实验现象：可以看到心脏和脉搏同时动。
探究问题：
1、人体心脏、脉搏的位置在哪里？
2、心脏跳动的同时，脉搏有什么反应？
3、心脏的跳动和脉搏有什么关系？为什么？
实验结论与体会：
（以下由学生总结并交流，也可由教师引导得出。）
课外活动：
1、运动后心跳明显加快，此时用右手手指测量左手臂上的脉搏，有什么变化？
2、人体内除了手腕部位有脉搏，其他部位还有吗？在哪里？
注意事项：
操作时，挤压模拟心脏的速度不应过快、过猛，一般应和人体实际跳动频率相仿。
The pulse-rates detector for the human body
Experimental purpose:
Knowing that it is synchronous for the pulse rates and the heart beating
Experimental equipment:
The pulse-rates detector for human body
Raising the question:
Is it synchronous for the pulse rates and the heart beating?
Conjecture and assumptions:
It is probably related for the pulse rates and the heart beating.
Experimental process: (designed by the students independent or guided by the teachers)
It is synchronous for the pulse rates and the heart beating. The human body is a “black box”, so the students can not observe why the pulse rates and the heart beating are synchronous directly. The detector demonstrates the heart squeezing, and get the feedback on the pulse. At the back of the detector there is a pipeline connecting the heart to the pulse, so because of the vascular connectivity the heart beating results in the synchronized movement of the pulse consequentially.
Experimental phenomena:
We can see the heart and the pulse are motional synchronously.
Researching issues:
1.Where are the heart and the pulse in the human body?
2.What is the response for the pulse when the heart beats?
3.What is the relationship between the heart beating and the pulse? Why?
Experimental conclusions and the experience:
The followings can be concluded and discussed by the students, or guided to get by the teachers.
Extra-curricular activities:
1.The heart beating speeds up obviously after sports, then you can measure the pulse rates of the left arm with the fingers of the right hand, and what happened?
2.Are there the pulses elsewhere except the wrist? Where?
Caution:
The speed squeezing the heart should not be too fast and strong, and should be consistent with the actual frequency for the human body generally.
