Final answer:
The space between the cheeks or lips and the teeth is called the oral vestibule, and it is framed by the gums and teeth inside and the cheeks and lips outside.
Step-by-step explanation:
The space between the cheeks or lips and the teeth is known as the oral vestibule. It is the pocket-like part of the mouth that is bordered on the inside by the gums and teeth, and on the exterior by the cheeks and lips. This area of the mouth is distinct from the pharynx, which is divided into three regions: the nasopharynx, the oropharynx, and the laryngopharynx. Furthermore, the fauces represent the opening between the oral cavity and the oropharynx, which is a passageway for both air and food. The larynx is located below the oropharynx and is associated with the vocal folds. The oral cavity, cheeks, and lips have a significant representation on the cerebral cortex, which underlines the human fascination with activities such as kissing.