5. The lips are muscular folds forming the anterior boundary of the oral cavity. A mucous membrane covers the lips internally and the skin of the face coves them externally. The vermillion border, which is the red part of the lips, is covered by keratinized epithelium that is the transition between the epithelium of the mucous membrane and the facial skin. The vermillion border can become chapped (dry and cracked), whereas the mucous membrane and the facial skin do not. Propose as many reasons as you can to explain why the vermillion border is more prone to drying than the mucous membrane or facial skin. On Editor Suggestions: Showing K hs

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
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5. The lips are muscular folds forming the anterior boundary of the oral cavity. A mucous
membrane covers the lips internally and the skin of the face coves them externally. The
vermillion border, which is the red part of the lips, is covered by keratinized epithelium that is
the transition between the epithelium of the mucous membrane and the facial skin. The
vermillion border can become chapped (dry and cracked), whereas the mucous membrane and
the facial skin do not. Propose as many reasons as you can to explain why the vermillion border
is more prone to drying than the mucous membrane or facial skin.
On Editor Suggestions: Showing
K
hs
Transcribed Image Text:5. The lips are muscular folds forming the anterior boundary of the oral cavity. A mucous membrane covers the lips internally and the skin of the face coves them externally. The vermillion border, which is the red part of the lips, is covered by keratinized epithelium that is the transition between the epithelium of the mucous membrane and the facial skin. The vermillion border can become chapped (dry and cracked), whereas the mucous membrane and the facial skin do not. Propose as many reasons as you can to explain why the vermillion border is more prone to drying than the mucous membrane or facial skin. On Editor Suggestions: Showing K hs
Expert Solution
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Lips are referred to as the muscular fold that covers or surrounds the oral cavity's opening. The cranial nerve VII is accountable for innervating the lips and helping in their motor functioning. Lips are soft and pliable anatomical structures of the body having epidermis, muscular, and connective tissue. 

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