General organization outer, middle, inner ear
- The ear consists of three parts:
- External ear - magenta region - consists of pinna (auricle)
and external auditory meatus. It ends at the tympanic membrane.
- Middle ear- bluish-gray region - contains the three ossicles
(bones) in an air filled cavity. Its boundaries are the tympanic membrane
and the oval window. It also contains the Eustachian tube (allows equalization
of pressure while swallowing) and two muscles - the tensor tympani (connects
to malleus) and the stapedius (connects to stapes). The two muscles help
protect the bones from excessively loud noises.
- Inner ear - orange region - osseus labyrinth filled with fluid
(perilymph) with a membranous labyrinth, also filled with fluid (endolymph),
What is the function of each region of the ear?
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