Ключевые слова: aquatic, background, benthic, biological, biology, body cavity, cells, detail, dugesia, education, eye, eye spots, eyespots, flat, flatworm, flatworms, freshwater, germ layers, isolated, jungle, laboratory, layers, macro photography, microscope, microscope view, microscopic, mucus, nerves, nervous, nervous system, ocelli, parasite, pharynx, planaria, planarian, planeria, platyhelminthes, predator, regeneration, scientific, scientist, separate, spot, system, turbellaria, turbellarian, white, worm, zoological, zoology,