Papillary muscles are found in :

Options

A. Haemocoel of cockroach
B. Auricles of heart
C. Ventricles of heart
D. Arm

Answer

To answer the question about where papillary muscles are found, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Papillary Muscles**:
- Papillary muscles are specialized muscles located in the heart. They play a crucial role in the functioning of the heart valves.

2. **Identifying the Location**:
- Papillary muscles are specifically found in the ventricles of the heart. They are attached to the lower portion of the interior wall of the ventricles.

3. **Function of Papillary Muscles**:
- These muscles are connected to the heart valves (specifically the tricuspid and mitral valves) via chordae tendineae. When the ventricles contract, the papillary muscles also contract, which helps to close the valves and prevent backflow of blood.

4. **Evaluating the Options**:
- The question provides several options:
- Hemocoel of cockroach
- Auricles of the heart
- Ventricles of the heart
- Arm
- Based on our understanding, we can eliminate the first two options (hemocoel of cockroach and auricles of the heart) as papillary muscles are not found there.

5. **Conclusion**:
- The correct answer is that papillary muscles are found in the **ventricles of the heart**.

### Final Answer:
Papillary muscles are found in the **ventricles of the heart**.

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