3.2 POJA-L02. Survey of lip

3.2  POJA-L02
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Title: Survey of lip 

Description:
Stain Azan, human. Arrows: labial glands in submucosa (mucous inner surface with non-keratinized epithelium).
Left side = skin surface (keratinized epithelium).
Bottom = transitional zone (red zone) with slightly keratinized epithelium.
X: orbicularis oris muscle. 

Keywords/Mesh: oral cavity, mouth, lip, skin, red zone, vermilion border, lining mucosa, labial gland, orbicularis oris muscle, histology, POJA collection

3.2 POJA-L05. Lip, transitional zone (red zone or vermilion border)

3.2 POJA-L06. Lip, transitional zone (red zone or vermilion border)

3.2 POJA-L11. Lip, region between red zone (vermilion border) and mucosal inner surface

​3.2  POJA-L05

Title: Lip, transitional zone (red zone or vermilion border)

Description:
Stain Azan, human. Slightly cornified epithelium with high irregular dermal papillae and many capillaries. Fat cells and skeletal muscle cells are located in the submucosa.

 3.2  POJA-L06

Title: Lip, transitional zone (red zone or vermilion border)

Description:
Stain Azan, human. Slightly cornified epithelium with high irregular dermal papillae and many capillaries. Note the epithelium is thicker, but less cornified than the epidermis. The red color of the lips is due to the rich vascularity of the lamina propria and the lucidity of the epithelium.

 3.2  POJA-L11

Title: Lip, region between red zone (vermilion border) and mucosal inner surface

Description:
Stain Azan, human. Bundles of skeletal muscle fibers (musculus orbicularis oris), highly vascularized lamina propria.
Note the narrow dermal papillae on the left side (inner lip) and the broad irregular papillae on the right side (red zone of the lip).

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