![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Lip: Vermilion zone
The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x
![Vermilion zone <p>The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.OC_.Lip-2-1-ping.png)
Vermilion zone
The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x
![- Dermal papillae <p>The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.OC_.Lip-2-2-ping.png)
- Dermal papillae
The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x
![- Blood vessels <p>The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.OC_.Lip-2-3-ping.png)
- Blood vessels
The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x
![Orbicularis oris muscle <p>The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.OC_.Lip-2-4-ping.png)
Orbicularis oris muscle
The vermilion zone is lined by a thick keratinized, stratified squamous epithelium and hair follicles are lacking. The numerous, densely packed dermal papillae of the lamina propria allow blood vessels close access to the surface, imparting a red color to this zone. The image on the right shows these details at higher magnification 100x, 400x
![Image source > <p>This image was taken of a slide from the University of Michigan collection.</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.OC_.Lip-2-5-ping.png)
Image source >
This image was taken of a slide from the University of Michigan collection.