Ключевые слова: biology, cell, ciliated, cilium, columnar, elastic, ependymal, epithelium, fibres, histological, histology, intestinal, intestine, lamina, layer, light, macro, magnification, membrane, micro, micrograph, microscope, microscopic, microscopical, microscopy, mucosa, neurohistology, neurology, organ, organic, respiratory, section, simple, stain, striated, tissue, trachea,