Anatomy of jaws is discussed briefly in this chapter. The human body has two jaws—an upper and a lower jaw. They are called maxilla and mandible. Mandible is the largest and strongest bone of the face. Maxilla is the spongy bone which is well adapted to sustain the stresses of mastication. The jaws form the oral cavity which is at the entrance of the digestive canal. The inside of the mouth is covered by mucous membrane, and forms the protective covering. The masticatory mechanism is formed by the teeth of upper and lower jaws, temporomandibular joints, the muscles of mastication, and the muscles of cheeks, lips and tongue.