Across
- 1. simplest form of sponges
- 3. cell where water enters the spongocoel
- 7. amoeba like cells in sponges
- 9. excurrent opening
- 11. canal system in certain sponges
- 12. fibrous material forming the skeletal network in demosponges
- 13. skeletal bodies found in sponges
Down
- 2. immobile
- 4. an opening or pore
- 5. cells on the surface of a sponge
- 6. matrix surrounding sponge cells
- 8. cells that line the cavities and canals of sponges
- 10. a complex sponge