What is vermilion border of lip keratinized?

The vermilion border of the lip is the transition area between the outer skin of the face and the mucous membrane of the oral cavity. It is a highly specialized area that is distinguishable by its reddish-pink color and its sharp demarcation from the surrounding skin.

The vermilion border of the lip is keratinized, which means that it has a layer of tough, protective cells on its surface. This keratinization makes the lip more resistant to wear and tear, as well as to damage from environmental factors like sun exposure and cold weather.

The keratinization of the vermilion border also means that it lacks the sebaceous glands and hair follicles that are present in the surrounding skin. This makes the lip more sensitive to touch and more prone to drying out, cracking and chapping.

Overall, the vermilion border of the lip is an important anatomical structure that contributes to the appearance, function, and health of the oral region.