Heart Electrical Conduction System

Quiz yourself with the picture below. Scroll down for the answer key. There’s a video are at the bottom if you want to watch it first.



  1. SA node (Aka: Sinoatrial node)
  2. AV bundle (Aka: Atrioventricular bundle, Bundle of His)
  3. Internodal pathways
  4. AV node (Atrioventricular node)
  5. Purkinje fibers
  6. Right and left bundle branches (Remember: Left side of heart has thicker ventricular walls)
  7. Right and left bundle branches
  8. Purkinje fibers