Heart rate is the amount of times the heart beats in one minuet
normal heart rate is 60-100 BPM
For more informaton contat me
http://wiki.answers.com/Q/How_heart_works&alreadyAsked=1
Heart rate is the measure of the hearts electrical system. Electrical impulses automatically are generated by special cells in a node at the top of the heart called the SA (Sinoatrial) node. These...
no, you can test and measure your heart rate by putting your fore finger and middle finger on the opposite wrist... you must find a point on the wrist where you feeling a beating rythem. now you...