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What is the gateway from the outer ear to the middle ear?
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15. The Special Senses
Introduction to Special Senses
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Which of the following structures functions in directing sound waves into the ear?
A
Eustachian tube
B
Pinna
C
Cochlea
D
Semicircular canals
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Identify the primary function of each structure listed in the options.
Understand that the Eustachian tube helps equalize pressure between the middle ear and the atmosphere, not in directing sound waves.
Recognize that the cochlea is involved in converting sound waves into nerve impulses, not in directing them.
Note that the semicircular canals are part of the vestibular system, responsible for balance, not sound direction.
Conclude that the pinna, also known as the auricle, is the external part of the ear that collects and directs sound waves into the ear canal.
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