town01| a | maxillary sinus |
| b | anterolateral wall |
| c | zygomatic recess |
| c1 | wall of recess |
| d | posterolateral wall |
| e | medial wall |
| f | sphenomaxillary (inferior orbital) fissure |
| g | base of greater sphenoidal wing |
| h | superimposed coronoid process and ascending ramus of mandible |
| i | zygomatic arch |