Lobulated tonsils with cyst evident in the superior right
tonsillar pole (long solid arrow). Note blunted and slightly bifid
tip of uvula. Posterior pillar is marked with a broken arrow
New cells show progressive maturation as they migrate to the surface layers, which are subsequently shed. Areas of the mouth
that receive a greater degree of masticatory stress, namely the hard palate, tongue dorsum, and gingiva, are lined with keratinized mucosa, giving more protection against friction and abrasion. This tissue is more firmly attached to the underlying periosteum, which prevents damage from shearing forces.