📖 what
What is the sinoatrial node?
Quick Answer
The sinoatrial node, or SA node, is the heart’s natural pacemaker that starts each heartbeat.
The Full Story
The SA node is a small group of specialized cells in the right atrium. It generates electrical impulses that spread through the atria and trigger the heart’s normal rhythm. Because it sets the pace, it is often called the natural pacemaker of the heart. If the SA node is damaged or becomes irregular, the heart may beat too slowly, too quickly, or irregularly, sometimes requiring a pacemaker.
Key Facts
1.Located in the right atrium
2.Known as the natural pacemaker
3.Starts each heartbeat
YouTube Angle
Suggested video title for this topic:
"The heart’s built-in starter switch."
Was this answer helpful?
Tap a reaction — it helps us pick what to cover next.