3.2 POJA-L 94
Title: Scheme survey lip
Scheme lip, adult human.
1. red (transitional) zone.
2. keratinized stratified squamous epithelium (outer side).
3. non-keratinized stratified squamous epithelium (inner side).
4. hair shaft.
5. hair follicle.
6. sebaceous gland.
7. cross-section of circumoral muscle.
8. labial glands with draining ducts.
9. infiltration of lymphocytes.
Keywords/Mesh: oral cavity, mouth, lip, red zone, skin, sebaceous gland, stratified epithelium, labial gland, histology, POJA collection
Title: Survey of lip
Stain Azan, human. Arrows point to labial glands in submucosa (mucous inner surface with non-keratinized epithelium).
Left side = skin surface (keratinized epithelium).
Below = transitional zone (red zone) with slightly keratinized epithelium.
X: orbicularis oris muscle.
Title: Lip 1, skin surface
Stain Azan, human. Keratinized squamous epithelium with hair follicles; submucosa with sebaceous glands, and extensions of skeletal muscle cells (orbicularis oris).
Title: Lip 2, skin surface
Stain Azan, human. Keratinized squamous epithelium with one hair follicle associated with sebaceous gland.
Richly vascularized connective tissue. Note the thin red cornified layer on the surface.