Fig-1 Normal ear drum (tympanic membrane)
Fig-2 Fluid in middle ear (glue ear)
Fig-3 Grommet (ventilation tube) in the ear drum
Fig-1 Normal ear drum (tympanic membrane)
Fig-2 Fluid in middle ear (glue ear)
Fig-3 Grommet (ventilation tube) in the ear drum
Click here to see Anatomy of ear and hearing, animation on medindia.net
Ear is divided into three parts-
Outer ear protects ear drum and sends sound to the middle ear and protect ear drum. Outer 1/3rd of canal contains ceruminous glands which secret wax .
Middle ear is an air filled cavity separated from external ear by ear drum and connects to nasopharynx by Eustachian tube. Middle ear contain three small movable bones (ossicles) malleus, incus and stapes which converts sound waves into mechanical vibrations.
Inner ear contains cochlea (for hearing ) and semicircular canals & vestibule (for balance ).
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