Lip: mucosal surface
The inner surface of the lip is lined by the mucosal epithelium, a thick, moist stratified squamous epithelium; a stratum granulosum is absent. Minor salivary glands (labial glands) are located in the submucosa beneath the lamina propria. The minor salivary glands produce both serous and mucous secretions. Mucosal epithelium also lines the cheeks, floor of the mouth and the ventral surface of the tongue. 10x, 100x
Area shown in right image
The inner surface of the lip is lined by the mucosal epithelium, a thick, moist stratified squamous epithelium; a stratum granulosum is absent. Minor salivary glands (labial glands) are located in the submucosa beneath the lamina propria. The minor salivary glands produce both serous and mucous secretions. Mucosal epithelium also lines the cheeks, floor of the mouth and the ventral surface of the tongue. 10x, 100x
Mucosal epithelium
The inner surface of the lip is lined by the mucosal epithelium, a thick, moist stratified squamous epithelium; a stratum granulosum is absent. Minor salivary glands (labial glands) are located in the submucosa beneath the lamina propria. The minor salivary glands produce both serous and mucous secretions. Mucosal epithelium also lines the cheeks, floor of the mouth and the ventral surface of the tongue. 10x, 100x
- Lamina propria
The inner surface of the lip is lined by the mucosal epithelium, a thick, moist stratified squamous epithelium; a stratum granulosum is absent. Minor salivary glands (labial glands) are located in the submucosa beneath the lamina propria. The minor salivary glands produce both serous and mucous secretions. Mucosal epithelium also lines the cheeks, floor of the mouth and the ventral surface of the tongue. 10x, 100x
Submucosa
The inner surface of the lip is lined by the mucosal epithelium, a thick, moist stratified squamous epithelium; a stratum granulosum is absent. Minor salivary glands (labial glands) are located in the submucosa beneath the lamina propria. The minor salivary glands produce both serous and mucous secretions. Mucosal epithelium also lines the cheeks, floor of the mouth and the ventral surface of the tongue. 10x, 100x
Labial glands in submucosa
The inner surface of the lip is lined by the mucosal epithelium, a thick, moist stratified squamous epithelium; a stratum granulosum is absent. Minor salivary glands (labial glands) are located in the submucosa beneath the lamina propria. The minor salivary glands produce both serous and mucous secretions. Mucosal epithelium also lines the cheeks, floor of the mouth and the ventral surface of the tongue. 10x, 100x
- Ducts of labial glands >
The ducts of labial glands empty into the vestibule of the oral cavity.
Orbicularis oris muscle
The ducts of labial glands empty into the vestibule of the oral cavity.
Image source >
This image was taken of a slide from the University of Michigan collection.
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