Arthropods

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Across
  1. 4. Used by spiders to inject venom into prey
  2. 8. Subphylum that contains lobsters
  3. 10. Arthropod subphylum that is now fully extinct
  4. 12. Process arthropods go through when they grow
  5. 13. Used by spiders for respiration
  6. 15. How many body segments do insects have
Down
  1. 1. Open body cavity with a heart and no blood vessels
  2. 2. Are usually herbivores
  3. 3. Antenna that branch into two
  4. 5. Anterior portion of a spider
  5. 6. A scorpions stinger
  6. 7. Used for excretion in crustaceans and considered a delicacy in lobsters
  7. 9. What exoskeletons of all arthropods are made of
  8. 11. Hard exterior covering that supports and covers arthropods
  9. 14. What kind of circulatory system do arthropods have