PATHOLOGY

Detailed explanation-1: -Air enters the insect’s body through the spiracle and enters the trachea. The trachea are tubes that are strengthened by rings of cuticle. From the trachea the air moves into smaller tubes called tracheoles that spread throughout the body of the insect and allow oxygen to be delivered to the various parts of the body.

Detailed explanation-2: -Oxygen and carbon dioxide gases are exchanged through a network of tubes called tracheae. Instead of nostrils, insects breathe through openings in the thorax and abdomen called spiracles.