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.

• 口位于消化道上顶端腔外，以双唇或上下腭为界、里面有发音器官的腔，在高级脊椎动物中包括舌、腭和齿