How many spiracles are found in cockroaches?

Cockroaches have a total of 20 spiracles on their body.

Spiracle Count and Respiratory System in Cockroach

Spiracles are small openings on the body of a cockroach that help it breathe. They are part of the respiratory system and connect to tracheae, which are air-filled tubes that carry oxygen directly to body tissues.

In a cockroach, these spiracles are found on the sides of the body, and they do not open all at once. Instead, they open and close as needed to allow air in and out, preventing water loss.

Distribution of Spiracles

Total Spiracles = 2 (thorax) + 18 (abdomen) = 20 spiracles

Why Spiracles Are Important in Cockroaches?

• Help in Breathing: Allow air to enter and exit the tracheal system.
• Prevent Water Loss: Spiracles close when not needed to avoid drying out.
• Controlled by Muscles: Open and close as per the cockroach’s need for oxygen.

Conclusion

Cockroaches have 20 spiracles in total—2 on the thorax and 18 on the abdomen. These tiny holes play a big role in helping the cockroach breathe and survive. They are a key part of its tracheal respiratory system, which is specially adapted for insects.