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Fibres spreading the impulse to ventricular contractile cells are the:

APeritoneal fibres
BPurkinje fibres
CPapillary fibres
DPericardial fibres
Answer & Solution
Correct answer: B. Purkinje fibres
1. The bundle branches deliver the impulse to the apex. 2. From there it must reach the working muscle. 3. Those final fibres are the Purkinje fibres. _Source: OpenStax Anatomy and Physiology 2e, Chapter 19, The Cardiovascular System: The Heart._
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