Biology Vocabulary

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