Simple Animals

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Across
  1. 4. both the male and female reproductive organs in the same individual.
  2. 6. occurring on the bottom of a body of water.
  3. 9. male and female reproductive organs in separate individuals.
  4. 12. mass of flagellated chambers and water canals.
  5. 13. members of the invertebrate animal phylum Cnidaria.
  6. 14. fibrous substance found in the skeleton.
  7. 16. animal or flower that has both male and female reproductive organs.
  8. 19. genus of calcareous sponges belonging to the family Sycettidae.
  9. 20. microscopic plants.
  10. 22. free-swimming or crawling larval.
Down
  1. 1. the large, central cavity of sponges.
  2. 2. animals that feed by straining suspended matter.
  3. 3. capable of or producing contraction.
  4. 5. attached by its base without a stalk or peduncle.
  5. 7. asexual reproduction in which a new individual develops from some generative anatomical point of the parent organism.
  6. 8. aperture in a sponge through which water is expelled.
  7. 10. a slender threadlike structure.
  8. 11. small clump of cells that forms on the lining of the colon.
  9. 15. small opening or orifice.
  10. 17. small needle-like or sharp-pointed structures.
  11. 18. sponge of a grade of structure of the simplest type.
  12. 21. the active immature form of an insect.