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| 咽鼓管 (长3.5〜4.0cm,斜向前内下方，以咽口和鼓室口分别连通鼻咽部鼓室和鼻咽部,使鼓室和外界的大气压相等。咽鼓管外侧1/3为骨部，内侧2/3为软骨部。咽鼓管黏膜与鼓室和咽的黏膜相续,纤毛向咽摆动，将中耳分泌物排至咽。咽鼓管咽口平时处于关闭状态。吞咽或张口时，在肌肉的牵拉作用下咽鼓管咽口开放，以调节鼓室内压，保持鼓膜内外压力平衡。若咽鼓管阻塞，鼓室内气体被吸收而造成负压，可引起鼓膜内陷,严重者可影响听力。小儿咽鼓管接近水平，短而宽，故咽部感染易沿咽鼓管侵入鼓室，可导致中耳炎) | |||
| 咽鼓管 | |||
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pharyngotympanic tube : 5 phrases in 2 subjects |
| Anatomy | 4 |
| Otorhinolaryngology | 1 |
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