In cockroach the number of soiracles is :

Options

A. 8
B. 10
C. 20
D. 14

Answer

To determine the number of spiracles present in a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Respiratory System of Cockroach**:
- The cockroach has a unique respiratory system that consists of a network of tubes called tracheae. These tracheae are responsible for gas exchange.

2. **Identify the Location of Spiracles**:
- Spiracles are small openings through which air enters the tracheal system. In cockroaches, these spiracles are located on the lateral sides of the body.

3. **Count the Spiracles**:
- Cockroaches have a total of 10 pairs of spiracles. This includes:
- **2 Thoracic Spiracles**: Located in the thoracic region.
- **8 Abdominal Spiracles**: Located in the abdominal region.

4. **Calculate Total Spiracles**:
- Adding the thoracic and abdominal spiracles gives us:
- 2 (thoracic) + 8 (abdominal) = 10 spiracles in total.

5. **Conclusion**:
- Therefore, the total number of spiracles present in a cockroach is **10**.

### Final Answer:
The number of spiracles in a cockroach is **10**.

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