Circulatory system of Pheretima is of

Options

A. Open type
B. Closed type
C. Both
D. None

Answer

To determine the type of circulatory system in Pheretima (the scientific name for earthworms), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Circulatory System**: The circulatory system is responsible for the flow of blood, the exchange of gases, and the transport of nutrients and waste products throughout the body.

2. **Identify the Types of Circulatory Systems**: There are two main types of circulatory systems:
- **Open Circulatory System**: Blood (or hemolymph) is not confined to vessels and flows freely in the body cavity. This type is typically found in lower organisms with less metabolic activity.
- **Closed Circulatory System**: Blood is contained within well-defined vessels (arteries and veins), allowing for more efficient transport and exchange of gases. This system is found in more metabolically active organisms.

3. **Examine the Organism in Question**: Pheretima, or earthworms, belong to the phylum Annelida. It is important to note the characteristics of this phylum.

4. **Determine the Type of Circulatory System in Pheretima**:
- Earthworms possess a closed circulatory system. Their blood circulates within vessels, which allows for efficient transport of nutrients and gases.

5. **Select the Correct Answer**: Based on the information gathered, the correct answer to the question is that the circulatory system of Pheretima is of the **closed type**.

### Final Answer:
The circulatory system of Pheretima is of the **closed type**.

---