File:Eustacian tube angle.jpg

From Embryology
Revision as of 00:06, 14 May 2009 by MarkHill (talk | contribs) (Newborn to adult Eustachian (auditory, otopharyngeal or pharyngotympanic) tube. Connects middle ear cavity to nasopharynx portion of pharynx Ventilation - pressure equalization in the middle ear Clearance - allow fluid drainage from the middle ear Tube)
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Eustacian_tube_angle.jpg(609 × 458 pixels, file size: 48 KB, MIME type: image/jpeg)

Newborn to adult Eustachian (auditory, otopharyngeal or pharyngotympanic) tube.

Connects middle ear cavity to nasopharynx portion of pharynx

Ventilation - pressure equalization in the middle ear

Clearance - allow fluid drainage from the middle ear Tube is normally closed and opened by muscles

At birth - shorter (17-18 mm), narrower and runs almost horizontal Tube is opened by a single muscle, tensor palati muscle

Adult - longer (twice as long), wider and runs at approximately 45 degrees to the horizontal. Tube is opened by two separate muscles, tensor palati and levator palati

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current00:06, 14 May 2009Thumbnail for version as of 00:06, 14 May 2009609 × 458 (48 KB)MarkHill (talk | contribs)Newborn to adult Eustachian (auditory, otopharyngeal or pharyngotympanic) tube. Connects middle ear cavity to nasopharynx portion of pharynx Ventilation - pressure equalization in the middle ear Clearance - allow fluid drainage from the middle ear Tube