Final answer:
The statement is false; both sides of the upper jaw typically have incisors and canines anchored in the alveolar process of the maxillary bone, which forms a significant part of the facial structure and aids in digestion.
Step-by-step explanation:
The statement that both sides of the upper jaw have neither incisors nor canines, but only a callous pad is False. The upper jaw, formed by the maxillary bones, includes the alveolar process where the teeth such as incisors, canines (cuspids), premolars (bicuspids), and molars are anchored in the alveoli. The incisors are used for cutting and slicing food, while the canines are used for tearing food. The statement may be referring to specific animals, such as ruminants, which have a dental pad rather than upper incisors and canines. However, in the typical human anatomy, this statement is incorrect.
The maxillary bone is essential in forming much of the hard palate, the floor of the orbit, and the base of the nose. Teeth are significant in the process of digestion, starting with the incisors that act like scissors to nip bites of food, canines that gnaw meat, premolars that mash, and molars that crush and grind food for swallowing.
The mandible, on the other hand, forms the lower jaw and is the only moveable bone of the skull that complements the maxillary bones of the upper jaw in facilitating the chewing process.