The cells of pheretima, which play an important role in intermediary metabolism 

Options

A. circular cells
B. phagocytes
C. chloragogencells
D. supporting cells

Answer

### Step-by-Step Solution:

1. **Understanding Intermediary Metabolism**:
- Intermediary metabolism refers to the complex network of biochemical reactions that occur within cells to produce energy and synthesize necessary biomolecules. It involves various metabolic pathways that convert nutrients into energy and building blocks for cellular functions.

2. **Identifying the Cells in Pheretima**:
- Pheretima, commonly known as earthworms, have different types of cells that perform various functions. The question asks which specific cells play a crucial role in intermediary metabolism.

3. **Analyzing the Options**:
- **Circular Cells**: These cells are primarily involved in movement and locomotion, not directly in metabolism.
- **Phagocytes**: These cells are responsible for engulfing and digesting foreign particles and bacteria, but they do not primarily contribute to intermediary metabolism.
- **Chloragogen Cells**: Also known as Y cells, these are found in annelids like Pheretima. They function similarly to the liver in vertebrates and are involved in detoxification and metabolic processes.
- **Supporting Cells**: These cells provide structural support but do not play a significant role in metabolic processes.

4. **Conclusion**:
- Among the options, **Chloragogen Cells** are the ones that play an important role in intermediary metabolism in Pheretima. They help in the detoxification and storage of nutrients, thus contributing to the metabolic processes.

### Final Answer:
The cells of Pheretima that play an important role in intermediary metabolism are **Chloragogen Cells**.

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