内耳道 - Meatus acusticus internus
The internal acoustic opening is a large orifice near the center of posterior surface of petrous part, its size varies considerably; its margins are smooth and rounded, and it leads into a short canal, the internal acoustic meatus, about 1 cm. in length, which runs lateralward. It transmits the facial and acoustic nerves and the internal auditory branch of the basilar artery.
This definition incorporates text from a public domain edition of Gray's Anatomy (20th U.S. edition of Gray's Anatomy of the Human Body, published in 1918 – from http://www.bartleby.com/107/).
一般解剖学 > 骨、骨格系 > 軸骨格 > 頭蓋；ズガイ > 側頭骨 > 岩様部；錐体乳突部 > 錐体後面 > 内耳道