Which of the following is often called the pacemaker of the heart?
A) Purkinje fibers
B) sinoatrial (SA) node
C) atrioventricular (AV) bundle (bundle of His)
D) atrioventricular (AV) node
Correct Answer:
Verified
Q4: The layer of the heart wall that
Q5: What are the tiny white cords that
Q6: Which valve is closed during heart relaxation
Q7: Which valve is located between the right
Q8: The transportation of blood from the right
Q10: The pointed, inferior portion of the heart,
Q11: The walls of the _ are substantially
Q12: The coronary veins empty blood from the
Q13: Oxygenated blood nourishing the myocardium comes from
Q14: The two superior receiving chambers of the
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