auditory tube

synonym: Eustachian tube
https://doi.org/10.1351/goldbook.10443

Narrow channel connecting the middle ear and the nasopharynx.

Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 728 (https://doi.org/10.1515/pac-2015-1202)