Lip: Comparison of epithelia
These images compare the epithelia of the vermillion zone (left) with that of the lining mucosa (right). (Iron hematoxylin/alcian blue stain) 400x
Vermillion zone >
The vermillion zone forms the red portion of the lip and like the skin on the surface of the lip, the epithelium here is keratinized and a stratum granulosum is present. Imparting the red color to this region are the numerous, dermal papillae that allow close approximation of blood vessels to the surface.
- Stratum granulosum
The vermillion zone forms the red portion of the lip and like the skin on the surface of the lip, the epithelium here is keratinized and a stratum granulosum is present. Imparting the red color to this region are the numerous, dermal papillae that allow close approximation of blood vessels to the surface.
- Dermal papillae
The vermillion zone forms the red portion of the lip and like the skin on the surface of the lip, the epithelium here is keratinized and a stratum granulosum is present. Imparting the red color to this region are the numerous, dermal papillae that allow close approximation of blood vessels to the surface.
- Blood vessels
The vermillion zone forms the red portion of the lip and like the skin on the surface of the lip, the epithelium here is keratinized and a stratum granulosum is present. Imparting the red color to this region are the numerous, dermal papillae that allow close approximation of blood vessels to the surface.
Oral (lining) mucosa >
Lining mucosa, surfaced by a thick stratified squamous moist epithelium, lines the inner surface of the lip. The epithelium of the lining mucosa lacks a stratum granulosum.
Image source >
These images were taken of a slide from the University of Virginia collection.
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