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know your body.-EARS

Any  sound playing a drum  ,song , music  is a vibration  which  travel  along the air  waves .These   sound vibration reach  an  cardrum.The  cardrum   is attached  to  a bone -called   hammer .This hammer  passes   the sound  onto   two  more  bones  called  anvil and stirrup.These    two  bones  transmit  the sound vibration  to inner ear   where these  sounds  are converted   into electrical  signals  that our brain  can interpret.We  can  differentiate  between high  and low volume   and pitch.Our   ears  not only  allows  us  to hear  but  they also  help  us to  keep  our balance.We  can also  detect  the direction of the sound.The  one of the outer part of the ear is called Penna.is used   to find out the direction of the sound.The smallest  bone  is the stirrup  it is hardly  larger than  grain  of rice.The ears  and nose  do  not  have  bones.Their  inner support  is cartilage or gristle   which is flexible  than bone.
 HUMAN  EAR

 

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