Spiracles are the openings on the sides of all insect's.Air rushes through the
spiracles to the tracheal tubes and diffuses into the body tissue and reaches every
parts of the body
tracheal system
tracheal system
Spiracles
tracheal system
tracheal system
tracheal tubes
tracheal tubes
Tracheal tubes
Large tracheal tubes
tracheal system
tracheal system
tracheal tubes