1.

Regulation and initiation of heartbeat is indicated by (karnataka - 94, CBSE- 95)

A. AV Node - bundle of His muscule - SA node - purkinje fiber
B. SA Node - purkinje fiber - AV Node - Bundle of His muscle
C. Purkinje fiber - AV Node - SA node - Bundle of His muscle
D. SA Node - AV Node - Bundle of His muscle - Purkinje fiber
Answer» E.


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