The Structures That Make Up the Primary Cardiac Conduction, in the Order

Multiple Choice

The structures that make up the primary cardiac conduction, in the order that the impulse travels through them, are the

A) AV node, SA node, bundle of His, and Purkinje fiber system.
B) Purkinje fiber system, AV node, SA node, and bundle of His.
C) Purkinje fiber system, bundle of His, AV node, and SA node.
D) SA node, AV node, bundle of His, and Purkinje fiber system.