Across
- 3. obtains energy from outside sources
- 4. outer layer
- 7. cell that has a nucleus and other organelles
- 8. sharp rigid structures used for support
- 10. cells that filter the nutrients
- 11. arrangment of body parts
- 13. can move to find food
- 14. no body cavity or organs
Down
- 1. hairlike structures that wave about and create currents
- 2. partial body cavity/ no organs
- 5. large opening at the top of the sponge
- 6. middle layer
- 9. no body part to create mirror images
- 12. inner layer
- 15. small openings along sponge that let material into the sponge