The number of spinal nerves in man is

Options

A. 31
B. 62
C. 12
D. 24

Answer

To solve the question regarding the number of spinal nerves in man, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definition of Spinal Nerves**: Spinal nerves are peripheral nerves that emerge from the spinal cord. They are responsible for transmitting signals between the spinal cord and the rest of the body.

2. **Identify the Types of Spinal Nerves**: In humans, spinal nerves are categorized based on their origin from different regions of the spinal cord. These regions include:
- Cervical (C) - 8 pairs
- Thoracic (T) - 12 pairs
- Lumbar (L) - 5 pairs
- Sacral (S) - 5 pairs
- Coccygeal (Co) - 1 pair

3. **Count the Total Number of Pairs**: To find the total number of spinal nerves, we need to add the number of pairs from each region:
- Cervical: 8 pairs
- Thoracic: 12 pairs
- Lumbar: 5 pairs
- Sacral: 5 pairs
- Coccygeal: 1 pair

Total = 8 + 12 + 5 + 5 + 1 = 31 pairs of spinal nerves.

4. **Convert Pairs to Single Nerves**: Since each pair consists of two nerves (one on each side of the body), we can calculate the total number of individual spinal nerves:
- Total spinal nerves = 31 pairs × 2 = 62 single spinal nerves.

5. **Conclusion**: Therefore, the total number of spinal nerves in humans is 62.

### Final Answer:
The number of spinal nerves in man is **62**.

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