The spinal cord is enclosed in 

Options

A. central canal
B. neural canal
C. both 1 & 2
D. none

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks what structure encloses the spinal cord. This requires knowledge of the anatomy of the spinal cord and its protective layers.

2. **Identifying the Options**: The options provided are "central canal," "neural canal," and "none." We need to determine which of these correctly describes the structure that encloses the spinal cord.

3. **Analyzing the Spinal Cord Structure**:
- The spinal cord is a vital part of the central nervous system, extending from the medulla oblongata and passing through the foramen magnum.
- It has protective layers, including the dura mater (outer layer) and pia mater (inner layer).

4. **Understanding the Central Canal**:
- The central canal is a small channel located within the spinal cord itself, surrounded by gray matter and lined with ependymal cells.
- It is not the structure that encloses the spinal cord but rather a feature within it.

5. **Understanding the Neural Canal**:
- The neural canal (also known as the vertebral canal) is a larger structure formed by the vertebrae of the spinal column.
- It serves to protect and enclose the spinal cord as a whole.

6. **Conclusion**: Based on the analysis, the spinal cord is enclosed in the **neural canal**.

### Final Answer:
The spinal cord is enclosed in the **neural canal**.

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