What are copulatory papillae ? Give their function.

Explanation

### Step-by-Step Text Solution

1. **Definition of Copulatory Papillae**:
Copulatory papillae are specialized structures found in earthworms, specifically located in the 17th and 19th segments of their bodies. They are conical ridges that play a significant role in the reproductive process.

2. **Location**:
These structures are found in pairs, specifically in the segments mentioned above, indicating their importance in the reproductive anatomy of earthworms.

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