Fig. 8.277 Oral fissure and lips. A. Anterior view. B. Sagittal section.
PhiltrumVestibuleOrbicularis oris muscleOral fissureVermilion border of lipFacial arterySuperior and inferior labial arteriesABLabial salivary glandsArtery and veinVermilion bordersOrbicularis oris muscleBuccinator muscle