The heart's pacemaker is located in the wall of which chamber?

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Multiple Choice

The heart's pacemaker is located in the wall of which chamber?

Explanation:
The heart’s natural pacemaker is the sinoatrial node, and it sits in the wall of the right atrium near where the superior vena cava enters. This location lets the impulse start in the atria, prompting them to contract first, then travel to the ventricles via the atrioventricular node and the rest of the conduction system. The other chambers don’t house the primary pacemaker tissue, so the right atrium is the correct site.

The heart’s natural pacemaker is the sinoatrial node, and it sits in the wall of the right atrium near where the superior vena cava enters. This location lets the impulse start in the atria, prompting them to contract first, then travel to the ventricles via the atrioventricular node and the rest of the conduction system. The other chambers don’t house the primary pacemaker tissue, so the right atrium is the correct site.

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