Which of the following represents the correct sequence of electrical conduction through the myocardium?
A. SA node, AV node, Bundle of His, bundle branches, Purkinje fibers
B. AV node, SA node, bundle branches, Bundle of His, Purkinje fibers
C. SA node, Bundle of His, AV node, bundle branches, Purkinje fibers
D. AV node, Purkinje fibers, SA node, Bundle of His, bundle branches
Answer: A. SA node, AV node, Bundle of His, bundle branches, Purkinje fibers
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