Ключевые слова: alveolar, alveolus, bacterial, bacterium, cell, cellulose, eosin, hematoxylin, histology, histopathology, infection, infectious, inflammation, lung, magnification, medical, medicine, micro, microbe, microbiology, micrograph, microorganism, microphotograph, microscope, microscopic, microscopy, morphological, morphology, pathogen, pathology, photomicrograph, pneumonia, pulmonary, stain, tissue,