Across
- 3. skeleton made up of hard particles
- 5. simple skeleton made up of network of protein
- 7. holes throughout the body
- 8. simple opening
Down
- 1. reproduction forms buds that break off by time
- 2. fixed to a rock
- 4. Class in which Porifera is located
- 6. cells line in the inside of the sponge which uses beating motion to move water through the sponge