Ключевые слова: 3d, acute, adult, air, allergic, allergy, anatomical, anatomy, background, bacterial, cavity, cells, cold, condition, disease, ethmoid, ethmoidal, face, frontal, headache, health, healthy, human, illness, illustration, infection, inflammation, isolated, male, man, maxillary, medical, medicine, microbial, nasal, nose, pain, paranasal, prevention, respiratory, science, sick, sickness, sinus, sinusitis, sphenoid, treatment, viral, virus,