AP BIOLOGY

Detailed explanation-1: -Insects such as cockroaches have spiracles, small openings on their body that allow air to enter the tracheal system. Since insects do not have lungs, they use spiracles that open and close by the contraction of their muscles to exchange oxygen and carbon dioxide with the outside air.

Detailed explanation-2: -Instead of nostrils, insects breathe through openings in the thorax and abdomen called spiracles. Insects that are diapausing or non-mobile have low metabolic rates and need to take in less oxygen. Insects exchange oxygen and carbon dioxide through spiracles (noted by circle).

Detailed explanation-3: -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-4: -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-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.