The __________ performs the work of the heart.
A) fibrous skeleton
B) pericardial cavity
C) endocardium
D) myocardium
E) epicardium
Correct Answer:
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Q32: The _ is the pacemaker that initiates
Q33: The _ valve regulates the flow of
Q36: The _ are the superior chambers of
Q38: The area where the major vessels lead
Q39: The right atrioventricular valve (tricuspid)regulates the opening
Q41: Atrial depolarization causes the _.
A) P wave
B)
Q42: The plateau in the action potential of
Q144: The _ carry blood toward the lungs.
A)
Q146: After entering the right atrium, the furthest
Q152: Which of the following blood vessels receives
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