The __________ is the pacemaker that initiates each heart beat.
A) sympathetic division of the nervous system
B) autonomic nervous system
C) sinoatrial (SA) node
D) atrioventricular (AV) node
E) cardiac conduction system
Correct Answer:
Verified
Q27: Pericardial fluid is found between the _
Q28: Which of the following is not part
Q29: The heart is located in the space
Q33: The _ valve regulates the flow of
Q36: The _ are the superior chambers of
Q37: The _ performs the work of the
Q138: Oxygen-poor blood passes through the _.
A) right
Q144: The _ carry blood toward the lungs.
A)
Q152: Which of the following blood vessels receives
Q158: Opening and closing of the heart valves
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