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