Across
- 3. creates a flow of water
- 6. segment of a tapeworm
- 8. cell in tentacle of jellyfish
- 9. has both kinds of reproductive organs
- 12. tapeworm head
- 14. stinging cells
- 15. traditional class turbellaria
- 16. middle layer of embryo
- 18. a two-way digestive tract
Down
- 1. has a false body cavity
- 2. scientific name for flatworms
- 4. extra piece of tissue
- 5. canal behind the nose and mouth
- 7. protects the body from damage
- 10. umbrella shaped body type
- 11. invertebrate lacking a coelomn
- 13. roundworm
- 17. a large opening