1 — Nasopalatine nerve; 2 — Hard palate; 3 — Soft palate; 4 — Pharyngeal tonsil; 5 — Sphenoidal sinus; 6 — Posterior ethmoidal cells; 7 — Frontal sinus; 8 — Frontal bone; 9 — Superior nasal concha; 10 — Middle nasal concha; 11 — Nasal bone; 12 — Lateral process; 13 — Limen nasi; 14 — Major alar cartilage, lateral crus; 15 — Nasal vestibule; 16 — Inferior nasal concha; 17 — Maxilla
