Coelom of hemichordates is

Options

A. Schizocoel
B. Enterocoel
C. Enterocoel with differentiation of three regions
D. Absent

Answer

### Step-by-Step Solution:

1. **Understanding Coelom**: The coelom is a fluid-filled body cavity that is lined by mesoderm. It plays a crucial role in the organization of the body and the development of complex organ systems.

2. **Identifying Hemichordates**: Hemichordates are a group of marine animals that are considered to be closely related to chordates. They exhibit some chordate features but are distinct in their own right.

3. **Types of Coelom**: There are different types of coeloms found in various animal groups:
- **Schizocoel**: Formed by the splitting of mesodermal tissue.
- **Enterocoel**: Formed from pouches of the archenteron (the primitive gut) during embryonic development.

4. **Coelom in Hemichordates**: In hemichordates, the coelom is classified as an enterocoel. This means it is formed from the gut pouches during embryonic development.

5. **Differentiation of Regions**: The body of hemichordates is divided into three distinct regions:
- **Collar**: The anterior part of the body.
- **Trunk**: The middle part of the body.
- **Proboscis**: The anterior extension that is often used for feeding.

6. **Conclusion**: Based on the above understanding, the correct answer to the question about the coelom of hemichordates is that it is an **enterocoel with differentiation into three regions**.

### Final Answer:
The coelom of hemichordates is **enterocoel with differentiation of three regions**.

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