Across
- 5. Spicules can be siliceous or (blank).
- 7. Horseshoe crabs are members of this class.
- 10. Annelids have radial and (blank) muscles.
- 11. A member of the type of Cnidarian body form that is primarily sessile.
- 12. Most animals are within this phylum.
- 15. The "bulbs" in the water vascular system along the radial canals.
- 16. The skeletal fibers of sponges are produced in these flagellated cells.
- 17. A member of the type of Cnidarian body form that is primarily motile.
- 19. Polychaetes have a linearly (blank) body, which is the main characteristic of annelids.
- 22. The flexible skeletal material in sponges.
- 23. Nematodes can be free-living or (blank).
- 24. A bivalve has two (blank).
- 25. Nematodes can enter the human body through bare feet because they often live in (blank).
Down
- 1. The type of flagellated cell in a sponge that helps to pull water through the sponge.
- 2. A characteristic of Chordates beginning with the letter "P".
- 3. A octopus is in the class cephalopoda, and in the phylum (blank).
- 4. Snails are in this class.
- 6. Cnidaria contains this organism that is often mistaken for a plant or mineral structure.
- 8. The phylum of sea urchins is (blank).
- 9. The common name of an organism from the extinct subphylum of arthropoda is (blank).
- 13. Flatworms have (blank) symmetry.
- 14. The tapeworm that is commonly found in humans is from the phylum.
- 18. Cnidarians have many stinging capsules called (blank).
- 20. A phylum containing sessile organisms that always have radial symmetry.
- 21. Sponges have these hard skeletal fibers.