How do mosquitoes and grass hoppers respire?
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Insects, and some other invertebrates, exchange oxygen and carbon dioxide between their tissues and the air by a system of air-filled tubes called tracheae. Tracheae open to the outside through small holes called spiracles. In the grasshopper, the first and third segments of the thorax have a spiracle on each side.
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Oxygen travels to their tissues through tiny openings in the body walls called spiracles, and then through tiny blind-ended, air-filled tubes called tracheae.
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