Crus commune is a part of:
Correct Answer: Semicircular canal
Description: (c) Semicircular canal(Ref Shambaugh, 6th ed., page 42)The posterior and superior semicircular canals fuse together to form a common crus called as "crus commune" which opens into the utricle. Because of this the three semicircular canals open into utricle by five openings instead of six.
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