RT Book, Section A1 Goldman, Glenn D. A1 Dzubow, Leonard M. A1 Yelverton, Christopher B. SR Print(0) ID 1172749701 T1 Lip T2 Facial Flap Surgery YR 2013 FD 2013 PB McGraw Hill LLC PP New York, NY SN 9780071749251 LK dermatology.mhmedical.com/content.aspx?aid=1172749701 RD 2025/07/12 AB The lips and perioral region are central features of appearance. The lips also provide oral competence at rest and during mastication. They are central to facial expression and are sensory organs both for food and personal contact. The lips have rich vasculature and sensory innervation.