How many lymph glands are present in Pheretima?

Options

A. Many
B. 3 pairs
C. 4 pairs
D. 9 pairs

Answer

To determine how many lymph glands are present in Pheretima (the earthworm), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Lymph Glands**:
- Lymph glands are responsible for producing phagocyte cells (white blood cells) that help in fighting infections and foreign bacteria.

2. **Identify the Location of Lymph Glands in Pheretima**:
- Lymph glands in Pheretima are found from the 26th segment to the last segment of the earthworm.

3. **Count the Segments**:
- Pheretima, like other earthworms, has a segmented body. If we consider that the lymph glands are present from the 26th segment onward, we need to know how many segments are there in total.
- Typically, Pheretima has around 100 to 120 segments.

4. **Determine the Number of Lymph Glands**:
- The lymph glands are distributed across these segments. It is generally accepted that there are multiple lymph glands present in each segment from the 26th to the last segment.

5. **Conclusion**:
- Based on the information, it can be concluded that there are many lymph glands present in Pheretima, specifically starting from the 26th segment to the end.

### Final Answer:
- There are many lymph glands present in Pheretima.