The pharynx is part of the throat leading from cavities of the mouth and nose to the larynx and esophagus. It resides behind the mouth and nasal cavity, and it is more critical than the larynx, esophagus, and trachea. It is divided into three parts. These include the nasopharynx, the oropharynx, and the laryngopharynx. It is part of both the respiratory system and the digestive system.
The larynx is located in the front aspect of the neck, anterior to the lower portion of the pharynx, and above the trachea. The larynx is the voice box. It also engages in sound protection, breathing, and the safety of the trachea from which food is aspirated. It has vocal cords, and it also manipulates volume and pitch.
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