Insects, and some other invertebrates, exchange oxygen and carbon dioxide between their tissues and the air<span> by a system of </span>air<span>-filled </span>tubes<span> called tracheae. Tracheae open to the outside through small holes called spiracles. In the</span>grasshopper<span>, the first and third segments of the thorax have a spiracle on each side.</span>
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Answer:
The concept includes a number of interrelated ideas; the unifying one is that tradition refers to beliefs, objects or customs performed or believed in the past, originating in it, transmitted through time by being taught by one generation to the next, and are performed or believed in the present
Explanation:
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<em><u>Brainlists please</u></em></h2>
