Mandible (insect mouthpart)
Mandible (arthropod mouthpart), Insect mouthparts, Mandibulata
978-613-8-00800-2
6138008006
92
2011-10-24
34.00 €
eng
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Insect mandibles are a pair of appendages near the insect’s mouth, and the most anterior of the three pairs of oral appendages (the labrum is more anterior, but is a single fused structure). Their function is typically to grasp, crush, or cut the insect’s food, or to defend against predators or rivals. Insect mandibles, which appear to be evolutionarily derived from legs, move in the horizontal plane unlike those of vertebrates, which appear to be derived from gill arches and move vertically.The mouthparts of orthopteran insects are often used as a basic example of mandibulate (chewing) mouthparts, and the mandibles themselves are likewise generalized in structure. They are large and hardened, shaped like pinchers, with cutting surfaces on the distal portion and chewing or grinding surfaces basally. They are usually lined with teeth and move sideways.
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Биология
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