The cardiac conduction system is composed of a network of nerve fibers beginning with the sinoatrial (SA) node.
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Q6: Closure of the heart's four valves create
Q7: Atrial repolarization produces the T waves seen
Q8: The top of the heart is called
Q9: Parasympathetic stimulation of the heart decreases the
Q10: Blood from the coronary sinus empties into
Q12: The endocardial layer of the heart wall
Q13: The atrioventricular (AV) node is responsible for
Q14: The heart is in the pericardial cavity.
Q15: The oxygen-rich vessels that supply the heart
Q16: Due to the small diameter of the
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