A respiratory tract is a part of the respiratory system involved in the respiration process of human beings. There are three basic regions to the respiratory tracts that include Nasopharyngeal region, tracheobronchial region, and pulmonary region. Most pharmaceutical companies take the way through inhalation to reach the respiratory tract rather than other mediums. There are diseases like bronchial asthma that requires quick action. To protect your lungs from infection, we advise you to use products that are approved by the FDA.