The respiratory system is a series of organs that work together to help your body breathe. The lungs are the most important part of the respiratory system, as they are responsible for taking in oxygen and releasing carbon dioxide. Its made up of your lungs, nose, mouth, throat, windpipe, diaphragm, and rib cage. Respiratory Illnesses: What You Need to Know There are many causes of respiratory diseases, such as viral infection, bacterial infection, long-term smoking, allergic reactions and other reasons, they will affect your respiratory tract and the cells in your nose, throat, trachea, lungs, causing cell damage and inflammatory lesions, and eventually develop respiratory disease Package Includes: 1 Bottles (1floz) x AirFlow Organic Herbal Mouth Spray