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  • The external ear consists of  Option: 1 Pinna and external auditory meatus  </p

The external ear consists of

 

Option: 1

Pinna and external auditory meatus

 

 

 


Option: 2

Cochlea and pinna

 


Option: 3

Eustachian tube and pinna

 


Option: 4

All of the above 


Answers (1)

best_answer

 

 

As we have already discussed in the Structure of Human External Ear -

External Ear:

  • It comprises a pinna, external auditory meatus (canal) & tympanic membrane.
  • Pinna:
    • The pinna collects the vibrations in the air which produce sound. 
    • It is made of elastic cartilage covered with skin.
  • External Auditory Meatus:
    • It is a tubular passage supported by cartilage in its exterior part and by bone in its inner part.
    • Along the length of the auditory canal are ceruminous glands that contribute to the production of cerumen (earwax). 
    • Because cerumen is sticky it can help prevent small particles from finding their way to the tympanic membrane. 
    • Cerumen also helps prevent bacterial growth, waterproofs the auditory canal and tympanic membrane, and maybe a deterrent to small insects.
    • The external auditory meatus leads inwards and extends up to the tympanic membrane.

Hence, the correct option is Pinna and External Auditory Meatus.

Posted by

Ritika Kankaria

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