The cavity lying at the upper end of the alimentary canal, bounded on the outside by the lips and inside by the oropharynx and containing in higher vertebrates the tongue, gums, and teeth.

 
  • 口位于消化道上頂端腔外,以雙唇或上下腭為界、里面有發(fā)音器官的腔,在高級脊椎動(dòng)物中包括舌、腭和齒
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