Question

Which layer of the heart contains the pacemaker?

Answer 1

Sinoatrial Node(SA node):

1. The heart's natural pacemaker is the sinoatrial node (SA node).
2. The SA node, a tiny bundle of special cells in the right atrium, is where the impulse starts.
3. The contraction of the atria is caused by the electrical action propagating through the atria's walls.
4. The blood is propelled into the ventricles as a result of this.
5. The SA node is responsible for the heartbeat's rhythm and pace.
6. Because the SA (sinus) node fires regularly, the normal heart rhythm is known as the normal sinus rhythm.