The posterior semicircular canal is a part of the vestibular system and detects rotations of the head in the sagittal plane.
Read more about Posterior Semicircular Canal: Structure, See Also, Additional Images
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“My impression about the Panama Canal is that the great revolution it is going to introduce in the trade of the world is in the trade between the east and the west coast of the United States.”
—William Howard Taft (1857–1930)