wtrs02
| a | maxillary sinus (antrum) |
| a1 | zygomatic recess of antrum |
| b | orbit |
| c | left frontal sinus |
| d | anterolateral wall ("friendly line") |
| e | inferior rim |
| f | floor, orbit |
| g | medial wall, orbit |
| h | superior rim, orbit |
| i | zygomatico-frontal suture |
| j | lateral rim (and wall) |
| k | malar eminence |
| l | zygomatic arch |
| m | lateral wall of nostril (medial wall, antrum) |
| n | nasal septum |
| o | hard palate |
| p | oral cavity and tongue |
| r | petrous pyramid |