A neural canal is

Options

A. A central hollow portion through which the spinal cord passes.
B. A canal filled with pericardial fluid.
C. A hollow canal present in bone.
D. None of these

Answer

To answer the question "A neural canal is," we will analyze the options provided and identify the correct definition of a neural canal.

### Step-by-Step Solution:

1. **Understanding the Term "Neural Canal":**
- The term "neural canal" refers to a specific anatomical structure in vertebrates. It is crucial to understand its role and location in the body.

2. **Analyzing the Options:**
- **Option 1:** A central hollow portion through which the spinal cord passes.
- **Option 2:** A canal filled with pericardial fluid.
- **Option 3:** A hollow canal present in bone.
- **Option 4:** None of these.

3. **Evaluating Each Option:**
- **Option 1:** This option describes the neural canal accurately. It is indeed a central hollow portion that allows the spinal cord to pass through it.
- **Option 2:** This option refers to a canal related to the heart (pericardial fluid), which is not relevant to the neural canal.
- **Option 3:** This option describes a hollow canal in bone, which does not pertain to the neural canal.
- **Option 4:** This option states that none of the above are correct, which is not true since option 1 is accurate.

4. **Conclusion:**
- After evaluating all options, the correct answer is **Option 1:** A central hollow portion through which the spinal cord passes. This is the definition of a neural canal as it pertains to vertebrate anatomy.

### Final Answer:
A neural canal is a central hollow portion through which the spinal cord passes.

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