fap02| * | right frontal sinus |
| a | ethmoid sinus |
| b | medial wall, orbit |
| c | superior wall, orbit |
| d | zygomatic frontal suture |
| e | lateral wall, orbit |
| f | inferior wall, orbit |
| g | petrous pyramid projecting through maxillary sinus |
| h | anterolateral wall ("friendly line"), maxillary antrum |
| i | malar eminence |
| j | lesser wing, sphenoid bone |
| k | greater wing, sphenoid bone (innominate line) |
| l | inferior orbital fissure |
| m | nasal septum |
| n | hard palate |