FRANCIS LEROY, BIOCOSMOS / SCIENCE PHOTO LIBRARY FRANCIS LEROY, BIOCOSMOS / SCIENCE PHOTO LIBRARY
Mouth anatomy. Artwork of a section through the human head showing the anatomy of the mouth, nose and upper throat. Above the mouth is the nasal cavity (black), an air passage that connects with the top of the throat (pharynx). The nasal cavity is separated from the oral cavity by the hard (front) and soft (back) palate. The oral cavity is dominated by the tongue (red, bottom centre). Inhaled air is filtered, warmed and moistened by the mucous membrane of the nasal cavity and passes through the pharynx to the trachea (windpipe, bottom left). Behind the trachea is the oesophagus, which carries food to the stomach to be digested.
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