There are...
- 3 parts of the human ear:-
- External ear.
- Middle ear.
- Inner ear.
- 3 parts of the External ear:-
- auricle (pinna).
- external auditory meatus.
- Tympanic membrane.
- 3 layers in tympanic membrane:-
- Outter skin layer.
- middle fibrous layer.
- inner mucosal layer.
- 3 cranial nerves innervate the tympanic membrane:-
- C.N. V (trigeminal).
- C.N. IX(glossopharyngeal).
- C.N. X (Vagus).
-3 Parts of middle ear:-
- Tympanic cavity.
- Eustachian tube.
- Mastoid air cells.
- 3 parts of the tympanic cavity:-
- epi-tympanum.
- meso-tympanum.
- hypo-tympanum.
- 3 middle ear bones (auditory ossicles):-
- malleus.
- incus.
- stapes.
- 3 parts of the malleus:-
- Head.
- lateral process.
- handle.
- 3 parts of labyrinth:-
- Bony cochlea.
- 3 semicircular canals.
- Vestibule.
- 3 semicircular canals :
- Posterior.
- lateral.
- superior.
- 3 compartments of cavity of bony cochlea :-
- scala vestibuli: Upper compartment.
- scala media (cochlear duct):middle compartment.
- scala tympani: lower compartment.
- 3 membranes in cochlear duct:-
- vestibular.
- Tectorial.
- Basilar .
- 3 labyrnthine sensory end organs:-
- Of cochlea..called organ of corti.
- of s c c....called crista.
- of utricle and saccule..called macula.
Enjoy it,,,,,
Dr Ibrahim...