Across
- 3. Feet hollow thin-walled tube
- 7. Includes Sea Lillie's and Feather Stars
- 8. Vascular System A system that operates under water
- 9. includes sea stars
- 10. Internal skeleton of vertebrates
Down
- 1. Structure that works like the bulb of a dropper
- 2. Includes Brittle Stars
- 4. Includes Sea Urchins and Sand dollars
- 5. Includes Sea Cucucmbers
- 6. Long tapering arms, covered with short rounded spines