Changes

The middle ear is lined by cuboidal to columnar mucosal epithelium with scattered '''goblet cells'''.  The auditory tube is lined by pseudostratified, ciliated columnar epithelium with scattered goblet cells.  The goblet cells are more prominent at the tympanic cavity end, contributing to the surfactant nature of the secretions- containing '''lecithin''', lipids and '''mucopolysaccharides''' - that decreases surface tension and keeps the tube patent.  The density of '''cilia''' increases as the tube runs dorsolaterally to open into the nasopharynx behind the soft palate, facilitating movement and drainage of mucus and other material.

The middle ear is lined by cuboidal to columnar mucosal epithelium with scattered '''goblet cells'''.  The auditory tube is lined by pseudostratified, ciliated columnar epithelium with scattered goblet cells.  The goblet cells are more prominent at the tympanic cavity end, contributing to the surfactant nature of the secretions- containing '''lecithin''', lipids and '''mucopolysaccharides''' - that decreases surface tension and keeps the tube patent.  The density of '''cilia''' increases as the tube runs dorsolaterally to open into the nasopharynx behind the soft palate, facilitating movement and drainage of mucus and other material.

===Inner Ear===

===Inner Ear===