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cardio4 conduction

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
Sinoatrial node (SA):   located in the right atrium near the superior vena cava and is the primary pacemaker of the heart.  
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Atrioventricular node (AV):   or junctional node is located in the inferior wall of the right atrium close to the tricuspid valve.  
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Bundle of His:   a group of fibers that initiates at the atrioventricular node, enters the interventricular system, and splits into the left and right ventricles. The fibers branch into small Purkinje fibers.  
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Purkinje fibers   compose the last part of the electrical conduction system of the heart. The fibers relay the electrical impulses to the muscle cells of the heart.  
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