Eustachian tube

Upper respiratory system, showing entrance to auditory tube near middle.

The Eustachian tube /juːˌsteɪ.ʃənˈtjuːb/, also known as the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. In adult humans the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. It is named after the sixteenth-century anatomist Bartolomeo Eustachi.

单词	Pars ossea
释义	Pars ossea 英语百科 Eustachian tube The Eustachian tube /juːˌsteɪ.ʃənˈtjuːb/, also known as the auditory tube or pharyngotympanic tube, is a tube that links the nasopharynx to the middle ear. It is a part of the middle ear. In adult humans the Eustachian tube is approximately 35 mm (1.4 in) long and 3 mm (0.12 in) in diameter. It is named after the sixteenth-century anatomist Bartolomeo Eustachi.
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Pars ossea

Eustachian tube