In Periplaneta, ductus ejaculatorius of male reproductive system lies in

Options

A. 7th segment
B. 8th segmet
C. 5th segment
D. 6th segment

Answer

To solve the question regarding the location of the ductus ejaculatorius in the male reproductive system of Periplaneta (the cockroach), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: We are dealing with Periplaneta americana, commonly known as the cockroach.

2. **Understand the Male Reproductive System**: The male reproductive system of the cockroach includes various structures, among which is the ductus ejaculatorius.

3. **Locate the Accessory Reproductive Gland**: The male cockroach has a mushroom-shaped organ known as the accessory reproductive gland. This gland is crucial for the reproductive process.

4. **Determine the Segment Locations**: The accessory reproductive gland is located in the 6th and 7th segments of the cockroach's body.

5. **Identify the Ductus Ejaculatorius**: The ductus ejaculatorius, which is the ejaculatory duct, is connected to the accessory reproductive gland.

6. **Locate the Ductus Ejaculatorius**: The ductus ejaculatorius opens into the 7th segment of the cockroach.

7. **Conclusion**: Therefore, the ductus ejaculatorius of the male reproductive system in Periplaneta lies in the 7th segment.

### Final Answer:
The ductus ejaculatorius of the male reproductive system in Periplaneta lies in the **7th segment**.

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