**Core Concept**
The conduction system of the heart is a specialized network of fibers responsible for generating and regulating the heartbeat, allowing for coordinated contraction of the atria and ventricles.

**Why the Correct Answer is Right**
The conduction system begins with the sinoatrial (SA) node, a group of specialized pacemaker cells located in the right atrium. The SA node generates electrical impulses that travel through the atrial conduction system (including the AV node, bundle of His, and bundle branches) to the ventricles. This coordinated electrical activity ensures a synchronized contraction of the heart chambers. The His-Purkinje system is crucial for rapid conduction of impulses from the AV node to the ventricles.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incomplete and does not provide a valid statement about the conduction system of the heart.
**Option B:** This option is incorrect because the AV node is actually a part of the atrial conduction system, not the ventricular conduction system.
**Option C:** This option is incorrect because the SA node is a pacemaker region that generates electrical impulses, not a relay station.

**Clinical Pearl / High-Yield Fact**
The His-Purkinje system is responsible for transmitting electrical impulses from the AV node to the ventricles, allowing for rapid contraction of the ventricles and efficient pumping of blood.

**Correct Answer:** C. The sinoatrial (SA) node generates electrical impulses that travel through the atrial conduction system to the ventricles.