Flatworm Flatworm Illustration of flatworm flatworm, Platyhelminthes, bilateral, unsegmented, invertebrate 2005-03-05 image/svg+xml Flatworm 2005-03-05 Integration and Application Network https://ian.umces.edu/media-library/flatworm/ https://ian.umces.edu/media-library/flatworm/ en-US flatworm, Platyhelminthes, bilateral, unsegmented, invertebrate Illustration of flatworm