Echinoderms &
Chordates
Across
8. Posterior structure found in all chordate larvas
10. Echinoderm that have thin arms that break easily to escape predators
12. Spines on the skin of echinoderms
13. Opening on top of the starfish where water enters the water vascular system
15. Class of sea urchins
18. Barrel shaped chordates called sea squirts
19. Flexible nerve chord found in chordates
Down
1. Jawlike crushing mechanism of sea urchins
2. includes sea lilies and sea feathers
3. Armless echinoderm that lives on the ocean bottom and has a ring of modified tentacles
around its mouth
4. Larva of echinoderms
5. Type of symmetry for echinoderms
6. Body surface where the chordate nerve chords is located
7. System of tubes in echinoderms that helps them move and feed
9. Rigid endoskeleton of sea urchins
11. Sucker like structures that aid echinoderms in attaching to surfaces
14. Means spiny skinned animals
16. Flat, spineless echinoid found along sandy coastlines
17. Class of starfish
20. Subphylum of chordates containing lancelets