In arthropods the body cavity is called

Options

A. Interon
B. Pseudocoel
C. Hemocoel
D. Coelom

Answer

To answer the question "In arthropods, the body cavity is called," we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Body Cavity in Arthropods**:
- Arthropods are a group of invertebrates that include insects, arachnids, and crustaceans. They have a specific type of body cavity.

2. **Understand the Options Provided**:
- The options given are: tyndrone, pseudoseal, haemoseal, and coelom. We need to determine which of these terms correctly describes the body cavity in arthropods.

3. **Define the Term 'Coelom'**:
- The term 'coelom' refers to a fluid-filled body cavity that is completely lined by mesoderm. While many animals have a true coelom, arthropods have a modified version.

4. **Identify the Correct Term for Arthropods**:
- In arthropods, the body cavity is not a true coelom as seen in other organisms. Instead, it is referred to as a 'haemocoel' (or haemoseal), which is a cavity filled with blood.

5. **Explain the Function of the Haemocoel**:
- The haemocoel serves as a space for the organs to move and develop freely. It also acts as a shock absorber, protecting the organs from damage.

6. **Conclude with the Correct Answer**:
- Therefore, the correct answer to the question is 'haemoseal'.

### Final Answer:
In arthropods, the body cavity is called **haemoseal**.

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