Across
- 1. - a form of solid tissue containing cells and fibers
- 4. - Greek term that means "thread", describing roundworms
- 7. - More than one body form
- 10. - organisms with many cells
- 12. - flagellated collar cells
- 16. - proifera family that capture prey using spicules that act like velcro
- 17. - cavity between wall and gut
- 18. - A thick non-cellular cuticle secreted by the underlying epidermis
- 19. - Form the stiffening skeletal structure of the sponge and may be made of calcium carbonate
- 20. - Stinging cells that contains neurotoxin that paralyzes prey
Down
- 2. - individuals produce both male and female gametes at different times
- 3. - sponge cell type that move around in the mesohyl
- 5. - Class of Phylum Platyhelminthes which are non-ciliated teguments composed of glycoprotein
- 6. - Pores where water moves
- 8. - Simplest canal system with single large oscolum
- 9. - Pore-bearing animals
- 11. - Rod-shaped structures that expand and form a protective mocous coat around the animal
- 13. - Joined together by delicate microfibrils which filter out tiny food particles.
- 14. - most common parasite in the US
- 15. - More complex sense organs that open around their heads