The first four abdominal ganglia of cockroach supply rierves to the __ to_segments 

Options

A. 1-6
B. 3-6
C. 2-5
D. 4-6

Answer

To solve the question regarding the first four abdominal ganglia of a cockroach and the segments they supply nerves to, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Ganglia in Cockroaches**:
- The cockroach has a nervous system organized into ganglia, which are clusters of nerve cell bodies. These ganglia are present in two main body parts: the thorax and the abdomen.

2. **Identifying the Number of Segments**:
- The abdomen of a cockroach consists of 10 segments, numbered from 1 to 10.

3. **Locating the First Four Abdominal Ganglia**:
- The first four abdominal ganglia correspond to the first four segments of the abdomen. However, we need to determine which segments they innervate.

4. **Nerve Supply from Ganglia**:
- The first abdominal ganglion supplies nerves to the second abdominal segment.
- The second abdominal ganglion supplies nerves to the third abdominal segment.
- The third abdominal ganglion supplies nerves to the fourth abdominal segment.
- The fourth abdominal ganglion supplies nerves to the fifth abdominal segment.

5. **Conclusion**:
- Therefore, the first four abdominal ganglia of the cockroach supply nerves to the segments from 2 to 5.

### Final Answer:
The first four abdominal ganglia of the cockroach supply nerves to segments 2 to 5.

---