Movement of which muscles can alter the pericardial space in cockroach ?

Options

A. Circular
B. Longitudinal
C. Alary
D. Ciliary

Answer

To answer the question regarding which muscles can alter the pericardial space in a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Pericardial Space**:
- The pericardial space is the area surrounding the heart in an organism. In cockroaches, this space is important for the circulation of hemolymph (the insect equivalent of blood).

2. **Understand the Role of Muscles**:
- Muscles play a crucial role in altering the volume of the pericardial space. When muscles contract, they can change the shape and size of this space, which can help in the movement of hemolymph.

3. **Focus on Specific Muscles**:
- In cockroaches, the dorsal diaphragm is a key muscle that influences the pericardial space. It is associated with the heart and helps in the movement of hemolymph.

4. **Identify the Allery Muscles**:
- The Allery muscles are a type of muscle that is connected to the dorsal diaphragm. They assist in the contraction and relaxation process, which is essential for pumping blood through the cockroach's 13-chambered heart.

5. **Conclude with the Correct Answer**:
- Therefore, the muscles that can alter the pericardial space in cockroaches are the Allery muscles, which are associated with the dorsal diaphragm.

### Final Answer:
The muscles that can alter the pericardial space in a cockroach are the **Allery muscles**.

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