What does a trachea do in grasshoppers?

If you are referring to tracheal tubes, they are located
along the length of the abdomen in 8 pairs and there are also two pairs in the thorax
region. They have spiracles or openings to the outside environment. They are used by
members of class Insecta for respiration. The oxygen enters the tubules, which branch
into very fine tubules called tracheoles, and then, it diffuses into cells inside the
body cavity. The interior cells of Insects are never far from a tracheole. Likewise,
carbon dioxide diffuses from the cells of the body, into the tracheal tubes and out of
the spiracles back to the environment.