The mouth is the principal oral cavity, serving as the entry point for the digestive, respiratory, and vocal systems. Structurally, it is equipped with supporting tissues, including lips, cheeks, a tongue, and dental structures, all of which facilitate crucial physiological processes. Its function encompasses both mechanical and chemical digestion, beginning with the physical breakdown of food (mastication) and the initiation of enzymatic activity via saliva. Beyond digestion, the oral cavity plays an essential role in speech production, where controlled movements of the tongue and soft palate interact to form distinct sounds. It also provides a critical passage for airflow, facilitating respiration.