PHYSIOLOGY
BLOOD PHYSIOLOGY
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Question
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Third part of Cardiac Conduction System:This structures branches down from septum and out towards each ventricle. They *relay* the signal to the Purkinje fibers.
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Atrioventricular (AV) node
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Sinoatrial (SA) Node
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Bundle of His
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Purkinje fibers
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Explanation:
Detailed explanation-1: -The main parts of the system are the SA node, AV node, bundle of HIS, bundle branches, and Purkinje fibers.
Detailed explanation-2: -The conducting system of the heart consists of cardiac muscle cells and conducting fibers (not nervous tissue) that are specialized for initiating impulses and conducting them rapidly through the heart (see the image below). They initiate the normal cardiac cycle and coordinate the contractions of cardiac chambers.
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