Across
- 2. Spiny-skinned animals with radial symmetry, internal skeleton, but no body segments
- 4. Extensions of an echinoderm's water vascular system that stick out from the body and function in movement and obtaining food.
- 6. bulblike structure at the top of each tube foot, used in movement
- 8. Solitary, nocturnal echinoderm, with long, skinny arms for moving
- 9. Echinodermata means?
- 11. In sea stars, tiny light receptors located at the end of each arm
- 13. echinoderm having many feathery arms, usually atop a jointed stalk
- 14. structure that secretes enzymes to digest food
- 16. in sea stars, a network of water-filled canals that enables movement
- 19. In sea star, small filter on dorsal surface through which water enters
- 21. plates made up of calcium carbonate
- 22. In sea stars, small, ciliated projections on the skin, used for breathing
- 23. light- receptor at tip of each arm
Down
- 1. in sea urchins, five-toothed mouth part for eating algae
- 3. Round echinoderm, with no arms and long spines covering skin
- 5. Crinoids that move by means of flapping their feathery arms
- 7. hollow space in the central disk and in each arm
- 10. Round echinoderm, with no arms and short spines covering skin
- 11. an internal skeleton; first seen in echinoderms
- 12. what kind of radial symmerty do they usually have?
- 15. sessile crinoids with feathery arms; live attached by a stalk to the seafloor
- 17. Zone Sea stars live in?
- 18. echinoderms that usually have five arms radiating from a central body
- 20. cilitated fingerlike projection on dorsal surface