Biology 28 2 groups of arthropods

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Biology 28 2 groups of arthropods

  1. 1. 28-2 Groups of Arthropods
  2. 2. Cephalothorax• Region of a crustacean formed by the fusion of the head with the thorax.
  3. 3. thorax• Body part of a crustacean that lies just behind the head and houses most of the internal organs
  4. 4. Abdomen• Posterior part of an arthropod’s body
  5. 5. carapace• In crustaceans, the part of the exoskeleton that covers the cephalothorax; in turtles and tortoises, the dorsal part of the shell
  6. 6. mandible• Mouthpart adapted for biting and grinding food
  7. 7. Cheliped• One of the first pair of legs of decapods
  8. 8. swimmeret• Flipper- like appendages used by decapods for swimming.
  9. 9. chelicerae• Pair of mouthparts in chelicerates that contain fangs and are used to stab and paralyze prey.
  10. 10. pedipalps• Pair of mouthparts in chelicerates that are usually modified to grab prey.
  11. 11. Spinneret• Organ in spiders that contains silk glands
  12. 12. Key concept• Arthropods are classified based on the number and structure of their body segments and appendages- particularly their mouthparts.
  13. 13. Key Concept• Crustaceans typically have two pairs of antennae, two or three body sections, and chewing mouthparts called mandibles.
  14. 14. Key Concept• Chelicerates have mouthparts called chelicarae and two body sections, and nearly all have four pairs of walking legs.
  15. 15. Key Concept• Uniramians have jaws, one pair of antennae, and unbranched appendages.

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