In a human being, the number of spinal nerves is

Options

A. 31 pairs
B. 52 pairs
C. 12 pairs
D. 36 pairs

Explanation

To determine the number of spinal nerves in a human being, follow these steps:

1. **Identify the Total Number of Spinal Nerve Pairs**:
- In humans, spinal nerves are organized into pairs. There are a total of 31 pairs of spinal nerves.

2. **Categorize the Spinal Nerves by Region**:
- **Cervical Nerves**: There are 8 pairs of cervical spinal nerves (C1 to C8).
- **Thoracic Nerves**: There are 12 pairs of thoracic spinal nerves (T1 to T12).
- **Lumbar Nerves**: There are 5 pairs of lumbar spinal nerves (L1 to L5).
- **Sacral Nerves**: There are 5 pairs of sacral spinal nerves (S1 to S5).
- **Coccygeal Nerve**: There is 1 pair of coccygeal spinal nerves (Co1).

3. **Add the Pairs Together**:
- Now, add the pairs of spinal nerves from each category:
- Cervical: 8
- Thoracic: 12
- Lumbar: 5
- Sacral: 5
- Coccygeal: 1
- Total = 8 + 12 + 5 + 5 + 1 = 31 pairs.

4. **Conclusion**:
- Therefore, the total number of spinal nerves in a human being is **31 pairs**.