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    Exam 27: The Circulatory and Respiratory Systems
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    A Heartbeat Begins in the
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A Heartbeat Begins in the

Question 31

Question 31

Multiple Choice

A heartbeat begins in the


A) atrioventricular valve.
B) atrioventricular node.
C) sinoatrial node.
D) right ventricle.
E) left atrium.

Correct Answer:

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