1 — Mylohyoid line; 2 — Mandible; 3 — Palatine bone, horizontal plate; 4 — Palatine process; 5 — Maxilla, alveolar process; 6 — Inferior nasal concha; 7 — Ethmoid; Ethmoidal bone, perpendicular plate; 8 — Nasal spine; 9 — Nasal bone; 10 — Frontal sinus; 11 — Crista galli; 12 — Sphenofrontal suture; 13 — Sella turcica; 14 — Arterial grooves; 15 — Coronal suture; 16 — Dorsum sellae; 17 — Internal acoustic opening; 18 — Squamous suture; 19 — Groove for inferior petrosal sinus; 20 — Occipitomastoid suture; 21 — Groove for sigmoid sinus; 22 — Lambdoid suture; 23 — Groove for transverse sinus; 24 — Jugular foramen; 25 — Hypoglossal canal; 26 — Occipital condyle; 27 — Spheno-occipital synchondrosis; 28 — Sphenoidal sinus; 29 — Sphenovomerine suture; 30 — Sphenoidal crest; 31 — Pterygoid process, medial plate; 32 — Vomer
