The alveolar mucosa is contiguous with the attached gingiva. The alveolar mucosa is not attached tightly to the bone. The alveolar mucosa is shiny and not stippled. It is more reddened by the underlying blood vessels and thinness of the mucosa. Small blood vessels may be visible.
In the maxillary arch, the palatal gingiva does not change into alveolar mucosa but remains contiguous with the masticatory mucosa of the hard palate.