The vertebra that bears the dens is

Options

A. Atlas
B. Axis
C. C3
D. C7

Answer

To answer the question "The vertebra that bears the dens is", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Terminology**:
- The term "dens" refers to a specific anatomical structure that resembles a blunt tooth. It is also known as the "odontoid process".

2. **Identify the Relevant Vertebrae**:
- The vertebrae in question are the cervical vertebrae, specifically C1 (Atlas), C2 (Axis), and others like C3 and C7.

3. **Define the Atlas and Axis**:
- The Atlas (C1) is the first cervical vertebra and supports the skull.
- The Axis (C2) is the second cervical vertebra and is characterized by the presence of the dens.

4. **Locate the Dens**:
- The dens is a projection that arises from the Axis (C2). It acts as a pivot that allows for the rotation of the head.

5. **Conclusion**:
- Since the dens is specifically a feature of the Axis (C2), we conclude that the vertebra that bears the dens is the Axis.

### Final Answer:
The vertebra that bears the dens is the Axis (C2).

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