The Dub in “lub dub” is the closing of the and valves because pressure in the arteries is greater than in the .

The first heart sound (lub) can be heard the loudest at the mitral area. This sound represents the closure of the mitral and tricuspid valves and is a low pitched, dull sound at the beginning of ventricular systole. S2 – The second heart sound (dub)

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population. population is the number of people or animals in a particular place. an example of population is over eight million people living in new york city.

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