The cardiac impulse originates from the_____ and is passed on to the AV bundle by____

Explanation

To answer the question, "The cardiac impulse originates from the_____ and is passed on to the AV bundle by____," we can break it down into the following steps:

### Step-by-Step Solution:

1. **Identify the Origin of the Cardiac Impulse**:
- The cardiac impulse, or action potential, is generated by a specific part of the heart known as the sinoatrial node (SA node). The SA node is often referred to as the pacemaker of the heart because it initiates the electrical signals that regulate heartbeats.

2. **Understand the Pathway of the Impulse**:
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