Ключевые слова: anal, animal, anus, association, biological, biology, blood, conjunction, disease, dna, educational, flat, fluke, histology, liver, medical, medicine, micro, microscope, microscopic, microscopy, parasite, parasiteras, parasitic, parasitism, schistosoma, schistosome, schistosomiasis, science, scientific, tissue, trematoda, trematode, worm, zoological, zoology,