Lab 32: Ear & Hearing

External Acoustic Meatus

S-shaped tube leading to eardrum

Tympanic Cavity

air-filled space containing auditory ossicles within middle ear

Stapes

auditory ossicle attached to oval window

Malleus

auditory ossicle attached to tympanic membrane

Tympanic Membrane (Eardrum)

cone-shaped, semi-transparent membrane attached to malleus

Auditory Tube

connects middle ear & pharynx

Tectorial Mmebrane

contact hairs of hearing receptors

Scala tympani

extends from apex of cochlea to round window & contains perilymph

Scala vestibuli

leads from oval window to apex of cochlea & contains perilymph

Membrane Labyrinth

tube containing endolymph within osseus labyrinth

Ceruminous Gland

wax-secreting structure