Question

The bony labyrinth of the internal ear is divided into three main areas. They are

• A. vestibule, cochlea, perilymph
• B. vestibule, saccule, utricle
• C. vestibule, semicircular canals, tympanic membrane
• D. vestibule, cochlea, semicircular canal

Answer 1

The correct option is D vestibule, cochlea, semicircular canal

The bony labyrinth, a cavity in the temporal bone, is divided into three sections:

• Vestibule: The vestibule is the central part of the bony labyrinth in the inner ear, and is situated medial to the eardrum (tympanic cavity), behind the cochlea, and in front of the three semicircular canals.
  
• The semicircular canals: The semicircular canals or semicircular ducts are three semicircular, interconnected tubes located in the innermost part of each ear, the inner ear. The three canals are the horizontal, superior and posterior semicircular canals.
  
• The cochlea: The cochlea is the part of the inner ear involved in hearing. It is a spiral-shaped cavity in the bony labyrinth, in humans making 2 turns(full) and a 3/4(3 quarters) turn around its axis, the modiolus.
  

So, the correct answer is 'vestibule, cochlea, semicircular canal'.