Cardovascular System

Question 1

Coordinated, rhythmic contraction of cardiac muscle originates in an electrical impulse generated by and traveling through a pathway formed by four electrically excitable structures. These are, in order:

Answer 1

The sinoatrial (SA) node, the atrioventricular (AV) node, the bundle of His (AV bundle) and its brancehs, and the Purkinje fibers