Alary muscle is associated with

Options

A. Heart and circulation
B. Malpighian tubules and excretion
C. Trachea and respiration
D. None of the above

Explanation

**Step-by-Step Solution:**

1. **Understanding Alary Muscles**: Alary muscles are specialized muscles found in certain invertebrates, particularly in the class of organisms known as coelenterates and some arthropods. They play a crucial role in the functioning of the circulatory system.

2. **Association with Circulatory System**: In the context of coelenterates (like jellyfish) and some arthropods (like insects), alary muscles are associated with the heart and help in the circulation of blood. They assist in the contraction and relaxation of the heart, which is essential for pumping blood throughout the body.

3. **Type of Circulatory System**: The circulatory system in these organisms is typically an open type. This means that the blood is not always contained within blood vessels but instead flows freely through cavities in the body.

4. **Conclusion**: Therefore, alary muscles are primarily associated with the heart and the process of blood circulation in organisms that possess them.

**Final Answer**: Alary muscles are associated with the heart and blood circulation.

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