Question at position 53 The semicircular ducts are three ring-like extensions of the __________, called the anterior, posterior, and lateral ducts.cochleatympanic membraneauditory canalvestibule

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The question asks which structure the semicircular ducts are extensions of, labeling them as anterior, posterior, and lateral ducts.
Option 1: cochlea. The cochlea is a spiral-shaped organ of hearing within the inner ear, not the origin of the semicircular ducts. This choice confuses the vestibular system with the auditory portion.
Option 2: tympanic membrane. The tympanic membrane, or eardrum, is part of the middle ear and serves as a boundary for sound transmission, not related to the semicircular ducts' origin.
Option 3: auditory canal. The external auditory canal (ear canal) conducts sound to the tympanic membrane and has no anatomical role as the origin of the semicircular ducts. This choice misplaces the ducts in the external ear pathway.
Option 4: vestibule. The semicircular ducts are three ring-like extensions of the vestibule, which is the central part of the bony labyrinth in the inner ear involved in balance. This aligns with the known anatomy where the ducts emanate from the vestibule region.

Question at position 53 The semicircular ducts are three ring-like extensions of the __________, called the anterior, posterior, and lateral ducts.cochleatympanic membraneauditory canalvestibule

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