Using a Stethoscope,you Listen to a Beating Heart and Hear

question 40

Multiple Choice

Using a stethoscope,you listen to a beating heart and hear "lub- dup,lub- dup." These sounds are created by

• A)muscles in the left ventricle.
• B)blood pressure differentials from chamber to chamber.
• C)blood flowing through the aorta.
• D)valves in the heart closing.

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