Maximum number of ganglia are present in Cockroach in

Options

A. Neck
B. Thorax
C. Abdomen
D. Head

Answer

To determine the maximum number of ganglia present in a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Body Structure of Cockroach**:
- The cockroach's body is divided into three main regions: head, thorax, and abdomen.

2. **Identify the Role of Ganglia**:
- Ganglia are clusters of nerve cell bodies that play a crucial role in transmitting nerve impulses. They are part of the nervous system in cockroaches.

3. **Count the Ganglia in Each Region**:
- In total, cockroaches have **9 ganglia**.
- The distribution of ganglia is as follows:
- **Thorax**: 3 ganglia
- **Abdomen**: 6 ganglia

4. **Examine the Abdominal Ganglia**:
- The abdominal region has ganglia located in segments 1 through 6.
- The 7th ganglion, which is the largest, is formed by the fusion of three ganglia.

5. **Eliminate Other Options**:
- The neck is not a recognized body part in cockroaches, so it cannot be considered.
- The thorax has only 3 ganglia, which is fewer than the abdomen.
- The head does not contain as many ganglia as the abdomen.

6. **Conclusion**:
- Since the abdominal region has the highest number of ganglia (6), the correct answer to the question is **abdomen**.

### Final Answer:
The maximum number of ganglia present in a cockroach is in the **abdomen**.

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