The respiratory system has five organs: The lungs, the trachea, the pharynx, the larynx, and the bronchi. The respiratory system has five essential functions: the first function is breathing: As air is inhaled through the nasal and oral cavities, it goes through the pharynx, the larynx, the trachea and finally to the lungs. The second function is the exchange of gases between the lungs and the bloodstream. The third function is the exchange of gases between the bloodstream and body tissues. The fourth function is the creation of sound through the upper respiratory tract, and the fifth function is the olfaction process.
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