my cross word

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Across
  1. 1. A more complex sponge body formed with a folded wall that increases the surface area of filtering water.
  2. 4. Tiny pores on the surface of a through which water enters the body
  3. 9. Permanently attached to a surface unable to move freely.
  4. 10. organisms that drift in water, often serving as a food source for larger animals .
  5. 12. A fibrous protein that forms a soft flexible skeleton in some sponges.
Down
  1. 2. Capable of shortening or contracting
  2. 3. The central cavity within a sponge where water is collected after passing through the osita.
  3. 5. The simplest form of a sponge.
  4. 6. The large opening of the top of sponge through which water.
  5. 7. Feeder AN organism that feeds by filtering out plankton or other organisms from the water.
  6. 8. An immature, often mobile stage of life cycle of many animals.
  7. 11. Small, needle- like structures made of calcium carbonate or silica that form the skeletal support of most sponges.