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Oral mucosa: Lining
Lining mucosa lines all of the oral cavity except the gingiva, hard palate, and the dorsum of the tongue. It is composed of stratified squamous moist epithelium and its underlying lamina propria; a muscularis mucosae is lacking. A submucosa lies beneath the mucosa and usually contains the minor salivary glands (mixed glands). 100x

Epithelium
Lining mucosa lines all of the oral cavity except the gingiva, hard palate, and the dorsum of the tongue. It is composed of stratified squamous moist epithelium and its underlying lamina propria; a muscularis mucosae is lacking. A submucosa lies beneath the mucosa and usually contains the minor salivary glands (mixed glands). 100x

Lamina propria
Lining mucosa lines all of the oral cavity except the gingiva, hard palate, and the dorsum of the tongue. It is composed of stratified squamous moist epithelium and its underlying lamina propria; a muscularis mucosae is lacking. A submucosa lies beneath the mucosa and usually contains the minor salivary glands (mixed glands). 100x

Submucosa
Lining mucosa lines all of the oral cavity except the gingiva, hard palate, and the dorsum of the tongue. It is composed of stratified squamous moist epithelium and its underlying lamina propria; a muscularis mucosae is lacking. A submucosa lies beneath the mucosa and usually contains the minor salivary glands (mixed glands). 100x

Minor salivary glands
Lining mucosa lines all of the oral cavity except the gingiva, hard palate, and the dorsum of the tongue. It is composed of stratified squamous moist epithelium and its underlying lamina propria; a muscularis mucosae is lacking. A submucosa lies beneath the mucosa and usually contains the minor salivary glands (mixed glands). 100x

- Ducts of glands
Lining mucosa lines all of the oral cavity except the gingiva, hard palate, and the dorsum of the tongue. It is composed of stratified squamous moist epithelium and its underlying lamina propria; a muscularis mucosae is lacking. A submucosa lies beneath the mucosa and usually contains the minor salivary glands (mixed glands). 100x

Image source >
This image was taken of a slide from the University of Michigan collection.