Across
- 2. Jointed feet
- 6. Type of fertilization in some external arthropods
- 7. ___ tubes branching, air filled tubes that are used for respiration by terrestrial arthropods
- 8. Generate force to fly walk swim and pull on the exoskeleton
- 11. respiratory organs with layers of respiratory tissue stacked
- 13. When arthropods shed their entire exoskeleton and make a new one
- 14. Mostly aquatic arthropods
Down
- 1. Structures like legs and antennae that extend from the body of the arthropod
- 3. Small openings that allow air to enter and leave the tracheal tubes
- 4. Type of circulatory system in arthropods
- 5. Type of reproduction in terrestrial and some aquatic arthropods
- 8. ___tubules: saclike organs that remove waste from blood
- 9. Material out of which the exoskeleton is made
- 10. external skeleton that protects and supports the body
- 12. Respiratory organs used by aquatic arthropods eg crab