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The Sinoatrial (SA) node generates electrical impulses to regulate the heartbeat.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Circulatory System - Comparative and Evolutionary Aspects
The SA node (sinoatrial node) acts as the pacemaker of the heart, initiating electrical impulses that regulate heartbeats.
Ref: NCERT Class 11 Biology Chapter 15: Body Fluids and Circulation Human Heart - Structure and Cardiac Cycle
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