Part of the digestive tube lying between the esophagus (below) and the mouth and nasal cavity (above and anterior).
Note: The pharynx is subdivided into the nasopharynx lying at the base of the nasal cavity, the oropharynx behind the mouth, and the laryngopharynx posterior to the larynx.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 792 (https://doi.org/10.1515/pac-2015-1202)