Describe the pathway of nerve impulses through the heart?

Answer 1

The normal, or natural, pacemaker of the heart is the sinoartial node, it passes the action potential to the ventricular node, which slows it down long enough for the ventricles to fill up with blood. Then the second contraction is triggered by the action potential traveling down the Bundle of His, or atrioventricular bundle, and then spread out the signal to the Purkinje fibers which transmit the action potentiall to all parts of the ventricles.

Answer 2

The inpulse starts in the sino atrial (SA) node then passes to the atrioventrivular (AV) node. From here the impulse passes down the septum in the bundle of His and then bundle branches which finally become the the purkinje fibres that spread the impulse all over the heart.

Answer 3

SA-node,AV-node.bundle of his and purkinge fibres.
First the SA node fires then the impulse goes to the AV node down to the Bundle of His to the Purkinji Fibers then the ventricles contract.

Answer 4

The pathway of an impulse through the heart:

Sinoatrial node

Atrioventricular node

Bundle of HIS

Left and Right Bundle Branches

Purkinje fibers

Here is a link that explains the process and has a picture of the path in the ralted links section.

Answer 5

SA node to AV node to AV bundle to bundle branches to purkinje fibers

Answer 6

The cues for the timing of the heartbeat comes from the electrical pathways