Which part of the intrinsic conduction system normally initiates the depolarizing impulse t
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SA node
AV node
Internodal pathway
AV bundle

The SA node, also known as the sinoatrial node, is often referred to as the heart’s natural pacemaker. It generates electrical impulses that prompt the heart to contract, leading to the rhythmic heartbeat that keeps blood flowing through your body. The fascinating part is that it does this spontaneously, meaning it doesn’t rely on any external signals!

Moving along, if the SA node is not functioning properly, the AV node can take over, but at a slower rate. This showcases the heart’s built-in backup systems—like having a Plan B ready to go! So even if the primary boss (the SA node) takes a sick day, the team (the AV node) is still ready to keep things ticking, albeit at a less enthusiastic pace!