Across
- 1. name for the overall shell of a sea urchin and sand dollar
- 3. innermost portion of a seastar
- 5. modified structure used for jet propulsion
- 7. mollusk with elongated mantle and tentacles/arms and eyes
- 8. sea slug
- 10. term used to describe the "arms" of sea stars
- 11. mouth appendage of a sea urchin containing teeth
- 14. meaning "spiny skin"
- 16. tissue found in mollusks typically used to create a shell
- 17. top surface of sea stars
- 19. used by many mollusks for burrowing, modified into arms/tentacles in cephalopods
- 20. structure that pumps water into the vascular system of starfish
- 21. elongated echinoderm with flexible body and respiratory trees
Down
- 2. echinoderm with elongated spines for locomotion and protection
- 4. modified antennae of nudibranchs
- 6. scraping tongue found in gastropods
- 9. specialized appendages found in feather stars and sea lilies for movement
- 12. skeletal plates found in sea urchins and sand dollars
- 13. radial symmetry made of 5 segments
- 15. original portion of bivalve shells
- 18. numerous appendages used by echinoderms for various purposes such as locomotion and feeding
- 22. mollusk with two shells such as a clam