Ключевые слова: 3d, air, alveoli, alveolus, anatomy, artery, background, breath, breathing, bronchial, capillaries, capillary, carbon dioxide, cavity, connective, diagram, education, educational, gland, hollow, human, illustration, lining, lung, lungs, mucous, object, pulmonary, respiratory, science, scientific, structure, system, trachea, vein,