There are many different patterns of gas exchange demonstrated by different groups of insects. Gas exchange patterns in insects can range from continuous and diffusive ventilation, to discontinuous gas exchange.:65–68 During continuous gas exchange, oxygen is taken in and carbon dioxide is released in a continuous cycle. In discontinuous gas exchange, however, the insect takes in oxygen while it is active and small amounts of carbon dioxide are released when the insect is at rest. Diffusive ventilation is simply a form of continuous gas exchange that occurs by diffusion rather than physically taking in the oxygen. Some species of insect that are submerged also have adaptations to aid in respiration. As larvae, many insects have gills that can extract oxygen dissolved in water, while others need to rise to the water surface to replenish air supplies which may be held or trapped in special structures. COUNT 5
QSN1 What kind of exchange is demonstrated by different insects? ANS1 gas exchange QSN2 Gas exchange patterns can contain what kind of ventilation? ANS2 diffusive ventilation QSN3 Carbon dioxide is released continuously in what kind of gas exchange? ANS3 continuous gas exchange QSN4 What gas exchanges does carbon dioxide release when the insect is resting? ANS4 discontinuous gas exchange QSN5 Diffusive ventilation occurs by what? ANS5 diffusion