SA Node, AV Node, Purkinje Fibers
- SA NODE= Found at upper portion of Right Atrium (wall), initiates the heart beat, sends out an "excitation" impulse every 0.85 sec to cause atrial contractions, keeps heartbeat regular (pacemaker)
- AV NODE= Found in base of Right Atrium (near septum), signals ventricular contraction by sending signals to the pukinje fibers
- PURKINJE FIBERS= Small and numerous, extending from two large fibers that carry the signal from the AV node through the ventricular walls, responsible for ventricular contractions occuring
VIDEO TIME... :)
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