In pheretima the testis are located in which segments.

Answer

To answer the question regarding the location of the testis in the earthworm Pheretima, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Understand that Pheretima refers to a genus of earthworms, which are hermaphroditic organisms. This means they possess both male and female reproductive organs.

2. **Understand the Reproductive Anatomy**: In Pheretima, the male reproductive system includes testis, which are the organs responsible for producing sperm.

3. **Locate the Testis**: Pheretima has two pairs of testis, which can also be referred to as four testis in total.

4. **Identify the Specific Segments**: The testis in Pheretima are specifically located in the 10th and 11th segments of the earthworm's body.

5. **Additional Information**: The vasa deferentia, which are the ducts that carry sperm from the testis, extend up to the 18th segment.

### Final Answer:
The testis in Pheretima (earthworm) are located in the 10th and 11th segments.

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