The human airway starts at the nose and mouth opening that allows air to flow through the alveoli, lungs, capillary network, chambers, and pipes.
The nasopharynx is the medical term used for what’s inside the nose and is a major part of the respiratory tract. Other parts of the airway include the nasal cavity, oropharynx, hypopharynx, larynx, trachea, bronchi, alveolar sacs, pharynx, epiglottis, pleura, bronchiole, diaphragm, alveolar duct, nasal and sinus passages.
The lungs are where gas exchange takes place and if the lungs are not moving enough air to vital body parts then a few airway adjunct devices called a nasopharyngeal airway (NPA), oropharyngeal (OPA), blind insertion airway device (BALD), or an endotracheal airway can be inserted to achieve a sufficient airway for a person whose airway is compromised.
A nasopharyngeal airway or (NPA), is a soft tube that is inserted through the nasal passage and designed to prevent the tongue and epiglottis from falling against the posterior pharyngeal wall.
A oropharyngeal or (OPA) is also a soft tube that is inserted through the nasal passage and designed to prevent the tongue and epiglottis from falling against the posterior pharyngeal wall.
The airway anatomy inside a person is very important to living a healthy long life and was designed to inhale and exhale air, but thousands of people abuse their airway anatomy by smoking cigarettes, cigars, pipes, chewing tobacco, or inhaling some type of street drug and damage their airway anatomy causing them to become dependent on oxygen or cause them to die prematurely.