AP BIOLOGY

Detailed explanation-1: -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.

Detailed explanation-2: -Insects have small holes in their bodies that allow them to breathe. These holes are called spiracles. Air comes in the spiracles and goes to invertebrate trachea, or tubes.

Detailed explanation-3: -Respiration in insects such as cockroaches, houseflies, etc., occurs through a tracheal system. The tracheal system connects with the external environment through tiny pores on the insect’s abdomen and thorax called spiracles.

Detailed explanation-4: -Spiracles are the openings of the tracheal system on the integument of the insect. Some apterygote and larval insects lack valves in their spiracles and therefore have trachea that are always open to the environment, although these are often covered with sieve-like plates.

Detailed explanation-5: -Spiracles and the tracheal system of insects allow effective delivery of respiratory gases. During development, holometabolous insects encounter large changes in the functional morphology of gas exchange structures.