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Question

Draw a neat and labelled diagram of the human ear. Explain it working.

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Solution

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A labelled diagram of the ear is given below.


  1. As is seen from the figure, the ear consists of three main parts namely (i) outer ear (it) middle ear (iii) inner ear.
  2. When sound enters the outer ear, it is directed to the eardrum along the auditory canal.
  3. The eardrum is a membrane which starts vibrating.
  4. The vibrations are transmitted through the middle ear through a set of bones in the middle ear.
  5. In the middle ear the sound is amplified by the three bones; Hammer anvil and stirrup.
  6. The amplified pressure wave enters the inner ear which includes semicircular canals and cochlea.
  7. The amplified sound wave reaches into the inner ear.
  8. The inner ear is filled with a liquid called the cochlea which contains sound-sensitive cells.
  9. The sound cells transmit the vibrations to the brain through nerve cells and we hear the sound.

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