…There are six auricular muscles attached to the ear, but in humans, the ear cannot normally be moved. The external auditory canal meatus acusticus externus is a tube with a long diameter of about 0.9 cm and a length of about 2.5 cm, and the eardrum is located at the back. Normally, it is not straight but curved in an S-shape, but if the auricle is pulled backwards, the external auditory canal becomes straight. … *Some of the terminology that mentions "meatus acusticus externus" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…耳介には六つの耳介筋がついているが,ヒトでは,ふつうは耳を動かすことができない。外耳道meatus acusticus externusは長径約0.9cm,長さ約2.5cmの筒状をなしており,奥に鼓膜が存在する。通常は直線でなくS状にまがっているが,耳介を後方へ引っ張ると外耳道がまっすぐとなる。… ※「meatus acusticus externus」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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