A. Orbital part of orbicularis oculi muscle B. Palpebral part of orbicularis oculi muscle C. Levator labii superioris alaeque nasi D. Levator anguli oris muscle E. Zygomaticus major muscle F. Buccinator muscle G. Parotid duct H. Orbicularis oris muscle I. Depressor anguli oris muscle J. Depressor labii inferiorus muscle K. Masseter muscle L. Mandible M. Neck of mandible N. Condyle of mandible O. Zygomatic arch P. Anterior belly of digastric muscle Q. Posterior belly digastric muscle R. Sternocleidomastoid muscle S. Stylohyod muscle T. Stylohoid ligament U. Styloid process