Question

How many pairs of respiratory pores are found in a cockroach?

• A. 2
• B. 6
• C. 8
• D. 10

Hint:

Insects breathe through spiracles, not lungs. Gas exchange occurs via tracheal tubes.

Answer 1

The Correct Option is D

Step 1: Cockroach Respiratory System:
Cockroaches breathe through small openings on the sides of their body called spiracles (respiratory pores). Step 2: Arrangement of Spiracles:
They are paired and arranged laterally on the thorax and abdomen. In total, there are 20 spiracles present, i.e. 10 pairs. Step 3: Function:
Spiracles are connected to a network of tracheae and tracheoles, which carry oxygen directly to body tissues without blood circulation involvement.
Step 4: Final Answer:
Cockroaches have 10 pairs of respiratory pores (spiracles).