用一枚图钉,戳在一根火柴梗没有火药一端的正中点,使其垂直于图钉上;再将图钉的底面放在手腕的脉搏处,即可看到火柴梗随着脉搏轻微地搏动。一般成年人较为显著。孩子们大都看到过医生用听诊器听诊。有的孩子会用耳朵贴在爸爸妈妈胸前听心跳,也有孩子会用手指测量自已的脉搏。他们对心脏跳动的声音和脉搏搏动的感觉是饶有兴趣的。现在用自已做的简易脉搏计,可以形象地看到脉搏跳动的 Use a thumbtack to poke a matchstick at the center of one end of the gunpowder that is free of gunpowder so that it is perpendicular to the thumbtack. Place the underside of the thumbtack on the pulse of your wrist to see that the matchstick beats slightly with the pulse. The average adult is more obvious. Most children have seen a doctor stethoscope auscultation. Some children will use their ears attached to the father and mother chest to listen to the heart, there are children with their fingers to measure their own pulse. They are interested in the sound of the heart beating and the pulsating feeling of the pulse. Now with their own simple pulse meter, you can visually see the pulse beat