Question

What are spiracles?

Answer 1

Spiracles:

1. Respiration in insects such as cockroaches, houseflies, etc., occurs through a tracheal system.
2. The tracheal system connects with the external environment through tiny pores on the insect’s abdomen and thorax called spiracles.
3. A pair of spiracles are present on each body segment.
4. The air enters the spiracles connected to the tracheal chamber, which branch out into tracheoles that deliver the oxygen directly to every part of the body.
5. The expansion and contraction of the abdomen allow the gaseous exchange of oxygen and carbon dioxide.