| 1 | The middle ear is a small pocket of air behind the eardrum. | |
| 2 | Bones are richly supplied with blood from periosteal vessels. | |
| 3 | With the otoscope, the doctor can see your eardrum , the thin membrane between your outer and middle ear. | |
| 4 | The periosteum of the clavicle was ruptured, so the injury could not be classified as either type I or II. | |
| 5 | Other the hemal Kong Jin that comes from periosteum enters cartilage, but do not enter centrum ossification central belt. |