Alary muscles play an important role in

Options

A. Circulation of blood
B. Respiration
C. Body movement
D. Peristaisis

Explanation

**Step-by-Step Solution:**

1. **Understanding Alary Muscles**: Alary muscles are triangular-shaped muscles found in the heart of the cockroach. They are specifically located in the dorsal region of the cockroach's body.

2. **Function of Alary Muscles**: The primary role of alary muscles is to assist in the contraction of the heart. When these muscles contract, they help pump blood from the heart towards the anterior part of the cockroach's body.

3. **Circulatory System of Cockroach**: The cockroach has an open circulatory system, which means that the blood (hemolymph) is not contained within blood vessels but flows freely in a cavity called the hemocoel, bathing the visceral organs.

4. **Mechanism of Blood Flow**: The contraction of the alary muscles increases the pumping action of the heart, allowing blood to flow through small openings known as sinuses. This contraction pushes the blood in the anterior direction.

5. **Conclusion**: Given the role of alary muscles in facilitating the movement of blood through the heart and into the body, it can be concluded that alary muscles play an important role in the circulation of blood.

**Final Answer**: Alary muscles play an important role in **circulation of blood**.

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