Arthopods

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Across
  1. 3. An extinct form of arthropods
  2. 5. Hard outer covering of arthropods made of chitin
  3. 7. Free-living worm like stage of an insect
  4. 8. Periodic shedding of the exoskeleton
  5. 12. the process of transformation from an immature form to an adult form
  6. 13. An organ of anthropods used to sense sound
  7. 14. Stage in which animal changes from the larval form into the adult form
  8. 15. Powerful jaws of an insect
  9. 19. Segmented animals whose name means jointed foot
  10. 20. A larva of an insect with incomplete metamorphosis
  11. 21. Visual structure with only one lens that is used for detecting light.
  12. 26. Visual structure with many lenses
  13. 27. Hard external covering of the cephalothorax
  14. 28. An external respiratory opening
  15. 30. Secretes enzymes used to chemically break down food
  16. 33. Three pairs of organs where the silk is made and secreted
  17. 35. Pincer like mouth parts
  18. 37. Crustacean of the order or suborder Isopoda
  19. 39. Pair of walking legs modified as large pincers
Down
  1. 1. Class of arthropod including two body parts and 5 pair of legs
  2. 2. Restoration of a lost body part
  3. 4. Used to propel the crayfish backwards
  4. 6. Six legged arthropod
  5. 8. A class of arthropods with many body segments and legs
  6. 9. Name means many feet
  7. 10. paired sacs in the abdomen for gas exchange
  8. 11. Narrow tubules opening into the anterior part of the hindgut
  9. 16. Extensions of the body
  10. 17. Crustaceans having five pairs of walking legs
  11. 18. Removes excess water and waste from blood in crayfish
  12. 22. Appendages used in reproduction and swimming
  13. 23. A class of arthropods including two body parts and 4 pairs of legs
  14. 24. the part of the body of a mammal between the neck and the abdomen
  15. 25. Paired structures present on the head as mouthparts
  16. 29. Body part of Arachnids and Crustaceans where head and thorax are fused together
  17. 31. Chemicals secreted by many animal species that influence the behavior of other animals
  18. 32. True Bugs
  19. 34. Mouth appendages used for chewing and handling food
  20. 36. Appendages usually having a sensory function
  21. 38. Last pair abdominal appendages of lobsters and related crustaceans, forming part of the tail fan.
  22. 39. A fibrous substance forming the major constituent in the exoskeleton of arthropods