Name a carnial nerve that extends down to the abdominal region

Explanation

### Step-by-Step Solution:

1. **Understanding Cranial Nerves**: Cranial nerves are a set of twelve nerves that originate directly from the brain and brainstem. They are responsible for various functions, including sensory and motor functions of the head and neck.

2. **Identifying the Cranial Nerves**: Among these cranial nerves, we need to identify one that extends beyond the head and neck region down to the abdominal area.

3. **Recognizing the Vagus Nerve**: The vagus nerve, also known as cranial nerve X (10), is the longest cranial nerve. It has a wide distribution and innervates various organs in the thoracic and abdominal cavities.

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