Q. Regulation and initiation of heartbeat is indicated by (karnataka - 94, CBSE- 95) (Solved)
1. AV Node - bundle of His muscule - SA node - purkinje fiber
2. SA Node - purkinje fiber - AV Node - Bundle of His muscle
3. Purkinje fiber - AV Node - SA node - Bundle of His muscle
4. SA Node - AV Node - Bundle of His muscle - Purkinje fiber
- d. SA Node - AV Node - Bundle of His muscle - Purkinje fiber