Across
- 5. Crayfish, lobster, crab
- 6. Opening in tracheal tubes
- 8. Spiders have this kind of gills
- 10. Tubes where gas exchange takes place in an animal
- 11. Back of your throat
- 12. Vascular tissue that moves water upward only
- 13. Tissue made of living cells in a non-living matrix
- 16. Sheet muscle
- 18. Digestive system that has only two openings
- 19. Small vein
- 20. Grass and meat eater
Down
- 1. by-product of photosynthesis is oxygen and ...
- 2. Moving food throughout the body
- 3. Small artery
- 4. Type of muscle tissue that moves food throughout our body
- 7. Highly specialized tissue that is used for protection
- 9. Digestive system that has only one opening
- 11. Vascular tissue that moves dissolved organic molecules both up and down
- 14. Meat eater
- 15. Ascaris, Trichinella, Pinworms, Hookworms
- 17. Single air sack