Answer:
electrical impulse travels from the sinus node to the atrioventricular node across the cells of the heart left and right atria.
When the impulses get to the atrioventricular node which is located between atria and ventricles,it slow down for a short period of time
Step-by-step explanation:
Heart excitation starts from the sinoatrial (SA) node then propagates through right and left atria. The atrial depolarization expands to the atrioventricular node, and move via the bundle of His to the bundle branches or Purkinje fibers.
electrical impulse travels from the sinus node to the atrioventricular node across the cells of the heart left and right atria.
When the impulses get to the atrioventricular node which is located between atria and ventricles,it slow down for a short period of time and it's then continue the conduction pathway through bundle of His into ventricles.