How many pairs of spiracles are found in cockroach?

Options

A. 2 pairs in thorax and 8 pairs in abdomen
B. 1 pair in thorax and 8 pairs in abdomen
C. 2 pairs in thorax and 6 pairs in abdomen
D. 3 pairs in thorax and 8 pairs in abdomen

Explanation

To determine how many pairs of spiracles are found in a cockroach, we can follow these steps:

### Step-by-Step Solution:

1. **Understand what Spiracles are**:
Spiracles are small openings that are part of the tracheal system in insects. They allow air to enter the body for respiration.

2. **Identify the Location of Spiracles**:
In cockroaches, spiracles are located on the integument (the outer covering of the body).

3. **Know the Structure of Cockroach**:
Cockroaches have a segmented body that consists of three main parts: the head, thorax, and abdomen.

4. **Count the Total Spiracles**:
A cockroach has a total of 20 spiracles, which can also be described as 10 pairs.

5. **Distribution of Spiracles**:
Out of these 10 pairs:
- There are **2 pairs of spiracles** located in the thorax.
- There are **8 pairs of spiracles** located in the abdomen.

6. **Conclusion**:
Therefore, the correct answer to the question is that cockroaches have **2 pairs of spiracles in the thorax and 8 pairs in the abdomen**.

### Final Answer:
Cockroaches have 2 pairs of spiracles in the thorax and 8 pairs in the abdomen.

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