The sinoatrial node (SAN) sets the heart's rhythm by generating electrical impulses that cause atrial contraction.
The sinoatrial node (SAN) initiates the heartbeat by generating electrical impulses that cause the atrial muscle to contract rhythmically.
| Front | Sinoatrial node (SAN) |
|---|---|
| Back | Sets the rhythm of the heartbeat by sending out regular waves of electrical activity to the atrial wall Generates electrical impulses that cause the cardiac muscle to contract |
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