grasshopper spiracles

Where Do Spiracles Open?

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Where Do Spiracles Open? Spiracles. 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. What causes the spiracles to open? What

For What Purpose Are Spiracles Used?

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For What Purpose Are Spiracles Used? In elasmobranch and ganoid fishes a pair of spiracles, derived from the gills, is used as a water passageway during respiration. The nasal opening of whales and other cetaceans is called a spiracle, as is the respiratory opening behind the eyes of rays and skates. Which animals use spiracles?