Ключевые слова: anatomy, animal, antenna, biology, black, cell, cladocera, college, compound, crustaceans, daphnia, division, ecology, education, environment, eye, fauna, flea, fleas, laboratory, lesson, life, light, macro, micro, microbiology, microorganism, microscope, microscopic, microscopy, plankton, pond, protozoa, pulex, school, science, small, training, transparent, water, water fleas, wildlife,