A nurse is teaching staff about the conduction of the heart. In which order will the nurse present the conduction cycle, starting with the first structure
1) Bundle of His
2) Purkinje network
3) Intraatrial pathways
4) Sinoatrial (SA) node
5) Atrioventricular (AV) node

A) 5, 4, 3, 2, 1
B) 4, 3, 5, 1, 2
C) 4, 5, 3, 1, 2
D) 5, 3, 4, 2, 1

Conduction Cycle

The process of electrical impulses moving through the heart's conduction system, coordinating its beating.

Bundle of His

A collection of heart muscle cells specialized for electrical conduction that transmits the electrical impulses from the atrioventricular node to the point of the apex of the fascicular branches.

Intraatrial Pathways

Specialized conductive fibers in the atria of the heart that facilitate the passage of electrical impulses.