The easiest way to know the working of the heart is through the pulse. We can find our pulse by lightly pressing on the wrist, just below the thumb. The pulse (beat) is caused by the contraction (squeezing) of the heart.
We can measure the heart rate by counting number of beats we can feel in 1 minute. When we are resting, pulse rate could vary between 70 and 100 beats per minute. When the heart muscle contracts (systole), it pumps blood out of the heart.
read more.....
http://www.wonderwhizkids.com/index.php/heart
We can measure the heart rate by counting number of beats we can feel in 1 minute. When we are resting, pulse rate could vary between 70 and 100 beats per minute. When the heart muscle contracts (systole), it pumps blood out of the heart.
read more.....
http://www.wonderwhizkids.com/index.php/heart
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