Final answer:
Each tooth has five main surfaces and is specialized for specific functions in chewing. There are 32 permanent teeth in adult humans, including incisors, canines, premolars, and molars.
Step-by-step explanation:
Each tooth in a human's mouth has five main surfaces. These surfaces include the facial (or buccal) surface which faces the cheeks, the lingual surface which is next to the tongue, the occlusal surface which is the flat biting surface, the mesial surface which is the edge of the tooth closest to the center of the mouth, and the distal surface which is the edge of the tooth farthest from the center of the mouth. With the different types of teeth including incisors, canines (or cuspids), premolars (or bicuspids), and molars, each tooth is specialized for various functions in the process of mastication, or chewing. Adult human dentition comprises 32 permanent teeth, including the third molars commonly known as wisdom teeth, which may sometimes be impacted and require orthodontic surgery.