Fifth & Sixth abdominal segments receive nerves from _____&____ ganglia respectively 

Options

A. `4^(th), 5^(th)`
B. `5^(th), 6^(th)`
C. `7^(th), 8^(th)`
D. `4^(th), 6^(th)`

Answer

To solve the question regarding which ganglia supply nerves to the fifth and sixth abdominal segments of a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Cockroach Abdomen**:
- The abdomen of a cockroach consists of 10 segments. Each segment can be numbered from 1 to 10.

2. **Identify the Ganglia Present**:
- In the abdomen, there are 6 ganglia present, which correspond to the first six abdominal segments. The ganglia are responsible for nerve supply and coordination.

3. **Mapping Ganglia to Abdominal Segments**:
- The ganglia are distributed as follows:
- 1st segment: 1st ganglion
- 2nd segment: 2nd ganglion
- 3rd segment: 3rd ganglion
- 4th segment: 4th ganglion
- 5th segment: 5th ganglion
- 6th segment: 6th ganglion
- Notably, the 5th and 6th segments receive their nerves from the 4th and 5th ganglia respectively.

4. **Conclusion**:
- Therefore, the fifth abdominal segment receives nerves from the **4th ganglion**, and the sixth abdominal segment receives nerves from the **5th ganglion**.

5. **Final Answer**:
- The fifth and sixth abdominal segments receive nerves from the **4th and 5th ganglia** respectively.