Biology · Human Physiology
Within the human cardiac conduction system, which structure functions as the primary natural pacemaker responsible for initiating each heartbeat?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1Sinoatrial (SA) node✓
- 2Bundle of His
- 3Purkinje fibers
- 4Atrioventricular (AV) node
Correct answer
Sinoatrial (SA) node
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