stanley #1

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Across
  1. 5. a phylum of aquatic invertebrate animals that comprises the sponges.
  2. 6. holes
  3. 7. microscopic structures of hard crystal material with fantastic shapes.
Down
  1. 1. a slender threadlike structure.
  2. 2. pumps water.
  3. 3. break down
  4. 4. cells that are found in connective tissue a biological organizational level between cells and a complete organ.