All of the following are of the size of adult at bih except
Correct Answer: Mastoid process
Description: The tympanic membrane, the ossicles and the cochlea have reached adult size at bih but the external auditory canal is much smaller than its adult size. In adults the tympanic membrane lies at about a 45-degree angle from the horizontal, while in newborns it is nearly horizontal. In Mastoid process pneumatization occurs along with increasing age. Ref- Dhingraa textbook for ENT 6th edition.
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ENT
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