More than one half of the total volume of neural tissue of the body is made up of  

Options

A. neurons
B. axons
C. perineurium
D. neuroglial cells

Answer

To solve the question "More than one half of the total volume of neural tissue of the body is made up of," we will analyze the options provided and determine which one is correct step by step.

### Step-by-Step Solution:

1. **Understand the Components of Neural Tissue**:
- Neural tissue primarily consists of two main types of cells: neurons and glial cells (neuroglia). Neurons are responsible for transmitting signals, while glial cells support and protect neurons.

2. **Evaluate the Options**:
- **Option A: Neurons**: Neurons are indeed a significant component of neural tissue, but they do not make up more than half of the total volume.
- **Option B: Axons**: Axons are part of neurons, specifically the long projections that transmit signals. They are not a separate entity that constitutes more than half of the neural tissue volume.
- **Option C: Perineurium**: The perineurium is a connective tissue sheath that surrounds nerve fibers. It does not account for more than half of the neural tissue volume.
- **Option D: Neuroglial Cells**: Neuroglial cells (or glial cells) are supporting cells in the nervous system. They are smaller than neurons and are much more numerous, making up about half or more of the total volume of the central nervous system (CNS).

3. **Conclusion**:
- Based on the analysis, neuroglial cells are the correct answer as they constitute more than one half of the total volume of neural tissue in the body.

### Final Answer:
The correct answer is **neuroglial cells** (Option D).

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