Heart Beat Notes: Definitions & Explanations PDF | Download eBooks
Study Heart Beat lecture notes PDF with college biology definitions and explanation to study What is Heart Beat?. Study heart beat definitions with college biology terms to review biology course for online degree programs.
Heart Beat Definition:
If you put your head against a friend's chest, or use a stethoscope, you can also the sounds of the valves closing to each heart beat. They sound rather like "lub-dup". Each complete "lub-dup" represents one heart beat.
Cambridge IGSCE Biology by Mary Jones, Geoff Jones
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