Across
- 2. The first cycle of a cnidarian
- 3. A parasitic annelid found in a forest near you!
- 6. Sea stars do this
- 8. The main body mass of a mollusk
- 9. A type of respiration
- 10. Specialized cells that remove excess water
- 12. The defence of a sea anenome
- 16. Used for food processing
- 17. Spongebob's own phylum
- 18. A type of parasite found in phylum nematoda
- 19. Large phylum of segemented worms
- 21. Without coelom
Down
- 1. Sharp spikes located in the mesenchyme of a sponge
- 4. Complete and incomplete ___
- 5. One of the two special breathing organs found in a crustacean
- 7. Found in squid and octopi
- 11. Water passes through this opening into the vascular system
- 13. The outer skin layer of an arthropod
- 14. Unsegemented worms
- 15. Poisonous ammonia from cellular respiration is removed using tube-shaped organs called ___
- 16. The phylum for sea stars
- 17. Used for sucking in food in a platyhelminthe
- 20. Fluid filled cavity in the mesoderm of an invertebrate
- 22. The second phase of a cnidarian