Across
- 2. They attach themselves firmly to a surface and do not move
- 6. A ciliated larva
- 7. Internal buds
- 8. The opening at the top of the sponge that water leaves through
- 10. Jellylike material between the two cell layers
- 14. A cnidocyte organelle that has a long filament coiled up inside of it
- 15. They trap plankton and other tiny organisms in their small, hairlike projections
- 17. A build up of dead polyps that make rocklike formations
- 18. A sensory structure at the end of a ctenophores body
- 19. Crawling cells that deliver nutrients throughout the body
- 20. Hollow gut, with one opening
- 23. Tiny, hard particles of calcium carbonate or silicon dioxide that are often shaped like spikes
- 24. The inner cell lay
- 26. flexible extensions
- 27. specialized cells used for defense and capturing prey
Down
- 1. Numerous pores that the water enters the sponge through
- 3. Aquatic animals that make up the phylum porifera
- 4. Flagellated cells also called collar cells
- 5. The outer cell layer
- 9. Bell-shaped and specialized for swimming
- 11. Produce both eggs and sperm
- 12. Cells that secrete a sticky substance that binds to their prey
- 13. production of light by means of a chemical reaction
- 16. The nervous response in cnidarians are controlled by this diffuse web of interconnected nerve cells
- 21. The regrowth of missing cells, tissues, or organs
- 22. Vase-shaped and specialized for a sessile existence
- 25. A simple skeleton made of tough, flexible protein fibers