Match the following parts of the ear with their functions.

$\begin{matrix} P a r t s o f t h e e a r & F u n c t i o n s 1. P i n n a & A . V i b r a t e s a n d t r a n s m i t s s o u n d w a v e s t o t h e o s s i c l e s 2. T y m p a n u m & B . S e n d s t h e a u d i o i m p u l s e s t o t h e c e r e b r u m 3. E a r o s s i c l e s & C . C o l l e c t s s o u n d a n d d i r e c t s i t i n t o t h e e a r 4. A u d i t o r y n e r v e & D . A m p l i f i e s a n d t r a n s m i t s t h e s o u n d t o c o c h l e a \end{matrix}$

1 - C, 2 - A, 3 - D, 4 - B

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1 - D, 2 - A, 3 - C, 4 - B

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1 - C, 2 - B, 3 - D, 4 - A

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1 - C, 2 - D, 3 - B, 4 - A

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Solution

The correct option is A
1 - C, 2 - A, 3 - D, 4 - B

Pinna is the outer visible part of the ear. It's function is to collect sound and direct it through the auditory canal to the inner parts of the ear. Tympanum, also known as the eardrum, is a membrane that vibrates and transmits sound to the ossicles. Ear ossicles are three tiny bones whose function is to amplify and transmit the sound waves to the cochlea. After the sound waves are converted to impulses, the auditory nerve transmits the impulses to the cerebrum.

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Match the following parts of the ear with functions

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\begin{matrix} C o l u m n I & C o l u m n I I i . Pinna & a . Collects vibrations in the air i i . Cochlea & b . Region between pinna and eardrum i i i . Meatus & c . Transfers vibrations to ear ossicles i v . Tympanic membrane & d . Translates sound to nerve impulses v . Eustachian tube & e . Equalises pressure between the inner and outer ear \end{matrix}

\begin{matrix} Parts & Function (a) External ear & (i) Amplifies the vibrations received on the tympanic membrane. (b) Middle Ear & (i i) Converts the vibrations into nerve impulses and sends them to brain. (c) Inner Ear & (i i i) Directs the sound waves towards the tympanic membrane. \end{matrix}

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