中鼻道 Middle meatus ·钩突 uncinate process 半月裂孔 semilunar hiatus 筛泡 ethmoid bulla 额窦 frontal sinus 前组筛窦 ethmoid sinus 上颌窦 maxillary sinus中鼻道 Middle meatus • 钩突 uncinate process • 半月裂孔 semilunar hiatus • 筛泡 ethmoid bulla • 额窦frontal sinus • 前组筛窦 ethmoud sinus • 上颌窦 maxillary sinus