1 — Palatine bone, horizontal plate; 2 — Pterygoid process, lateral plate; 3 — Choana; Posterior nasal aperture; 4 — Pterygoid process, medial plate; 5 — Sphenoid; Sphenoidal bone, body; 6 — Superior nasal concha; 7 — Sphenoidal sinus; 8 — Hypophysial fossa; 9 — Middle cranial fossa; 10 — Sphenoid; Sphenoidal bone, lesser wing; 11 — Superior nasal meatus; 12 — Cribriform plate; 13 — Frontal sinus; 14 — Anterior cranial fossa; 15 — Crista galli; 16 — Frontal bone; 17 — Nasal bone; 18 — Lacrimal bone; 19 — Maxilla, frontal process; 20 — Piriform aperture; 21 — Middle nasal meatus; 22 — Inferior nasal concha; 23 — Maxilla, palatine process; 24 — Inferior nasal meatus; 25 — Middle
nasal concha
