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The function of the pinna is to
Option: 1
helps prevent bacterial growth
Option: 2
collects the vibrations in the air which produce sound.
Option: 3
increase the efficiency of transmission of sound waves to the inner ear.
Option: 4
equalize the air pressure in the tympanic cavity with that on the outside.
Answers (1)
As we have 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.
Hence, the correct is: collects the vibrations in the air which produce sound.
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