Biology Vocabulary

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Across
  1. 1. the first pair of legs that bear large claws.
  2. 2. groups of individuals each castes has a body form specialized for its role
  3. 5. the posterior part of the body
  4. 7. part of the exoskeleton that covers the cephalothorax
  5. 9. tough external covering
  6. 10. air enters and leave the tracheal tubes through here
  7. 12. formed by fusion of the head with the thorax
  8. 13. organs that contain silk glands
  9. 17. a mouthpart adapted for biting and grinding food
  10. 18. the stage in which an insect changes from larva to adult
  11. 19. organs that have layers of respiratory tissue
Down
  1. 1. contains fangs and are used to stab and paralyze prey
  2. 3. structures such as legs and antennae that extend from the body wall
  3. 4. flipperlike appendages used for swimming
  4. 6. the skin of echinoderms that is stretched over an internal skeleton
  5. 8. how arthropods breath
  6. 11. protein and carbohydrates are called this
  7. 14. are used to grab prey
  8. 15. immature forms lack functional sexual organs
  9. 16. lies just behind the head and houses most of the internal organs