Platyhelminthes

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Across
  1. 8. Made of many cells
  2. 11. System that produces offspring
  3. 12. Ribbon-like shape
  4. 14. Flattened, oval-shaped body
  5. 15. Forms the middle layer
  6. 17. Waste leaves the body through this
  7. 18. System that senses stimuli and controls responses
  8. 19. Breaks down food
Down
  1. 1. Clear head with sensory organs
  2. 2. Nutrient molecules absorbed into the body
  3. 3. Nickname for Trematoda
  4. 4. Have flat bodies
  5. 5. Removes dissolved waste
  6. 6. Consume organisms to obtain nutrients
  7. 7. Produces sperm and eggs
  8. 8. Has fish gill parasites
  9. 9. Up to 65 feet
  10. 10. Forms the outer layer
  11. 13. This many classes of Platyhelminthes
  12. 16. Forms the inner layer