The respiratory system is considered among the most important systems in the human body. The respiratory system is divided into three completely different regions, each with different anatomical units. The primary region is referred to as the head airway region, the second as the lung airway, and the third region as the alveolar one. The inhaled particles that enter the respiratory system during the inhalation process will deposit in one of these regions, where several microorganisms and viruses additionally deposit, initiating different types of respiratory diseases