In cockroach which of the following help in exchange of gases ?

Options

A. Spiracles
B. Respiration tubule
C. Tracheoles
D. Abdomen

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks which structures in a cockroach are responsible for the exchange of gases.

2. **Identifying the Options**: The options provided are:
- Spiracles
- Respiration tubule
- Trichos
- Abdomen

3. **Analyzing Each Option**:
- **Spiracles**: These are small openings located on the sides of the cockroach's body. They are the entry points for air into the respiratory system.
- **Respiration Tubule**: This term is not commonly used in the context of cockroach anatomy. The correct term is "trachea," which are the tubes that carry air throughout the body.
- **Trichos**: This term refers to hair-like structures and does not play a role in gas exchange.
- **Abdomen**: While the abdomen houses various organs, it does not directly facilitate gas exchange.

4. **Conclusion**: The primary structures involved in gas exchange in cockroaches are the spiracles and the trachea. The spiracles allow air to enter, and the trachea transport oxygen to the body tissues.

5. **Final Answer**: The correct answer is **Spiracles** (and indirectly, the trachea).

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