Which of these is known as the pacemaker of the heart?(a) Purkinje fibers(b) AVN(c) SAN(d) Bundle of HisThe question was posed to me in an interview for job.The doubt is from Human Circulatory System in portion Body Fluids and Circulation of Biology – Class 11

Which of these is known as the pacemaker of the heart?(a) Purkinje fib

1.	Which of these is known as the pacemaker of the heart?(a) Purkinje fibers(b) AVN(c) SAN(d) Bundle of HisThe question was posed to me in an interview for job.The doubt is from Human Circulatory System in portion Body Fluids and Circulation of Biology – Class 11
Answer» Right answer is (c) SAN To explain I would say: The sinoatrial node, ABBREVIATED SAN, is known as the PACEMAKER of the heart. It has the ABILITY to generate 70-75 action POTENTIALS per minute, which INITIATES the contractility of the heart muscles.

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