Ключевые слова: animal, background, bacteria, bacterium, binary fission, biology, caudatum, cell, cilia, ciliate, conjugation, contractile, cytoplasm, education, endoplasm, exconjugant, fauna, foot, freshwater, holozoic, lab, laboratory, life, light, macro, magnification, micro, microbiology, microorganism, microscope, microscopic, microscopy, nature, nucleus, organism, paramecia, paramecium, pellicle, plankton, primitive, protozoa, protozoan, science, small, tiny, transmitted, transparent, vacuole, water, white, zoology,