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| 舌下间隙 (位于口底肌上方，上界为舌体和口底黏膜，下界为下颌舌骨肌和舌骨舌肌，前外侧界为下颌体，后界为舌根。间隙内有舌下腺、下颌下腺深部及其导管、舌神经、下颌下神经节、舌下神经和血管等。此间隙向后上与翼下颌间隙相通，在前方与对侧同名间隙相通) | |||
| 舌下间隙 | |||
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