The Middle Ear

Auditory Tube

Slit-shaped tube which is lined with pseudostratified columnar epithelium
At its origin it is surrounded by bone which is then replaced with a J-shape cartilage ring
Cartilage is partly hyaline and partly elastic
Mixed glands and lymph follicles are found in the lamina propria

A very low magnification of the auditory canal (Eustachian canal) demonstrating the different structures.
Fig 039-001

Fig. 21.23 Auditory (Eustachian) canal
Young and Heath p.397

Middle ear is lined by cuboidal epithelium and contains the malleus, incus and stapes. These ossicles are joined to each other by means of synovial joints.