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Anatomy of the ear e-chart - Quick reference guide. The inner ear contains three fluid-filled semicircular canals, and two chambers: the utricle and the saccule. These structures are the ones making up the organs of balance and hearing. All three semicircular canals are arranged in straight angles one with respect to the others. In this way, they can detect the movements made by the head no matter what the position of the body is. The saccule and the utricle allow us to perceive any change in the position of our bodies in relation to gravity. bodies in relation to gravity. bodies in relation to gravity.