What is the name of the structure labeled A? 
Definitions:
Absolute Threshold
The minimum intensity of stimulation that must occur before you experience a sensation.
Exposed Stimuli
Stimuli that are presented to an individual in a way that they can be perceived and processed by the senses.
Sense of Smell
The ability to perceive odors or scents through the olfactory system, which is part of the sensory system.
Semicircular Canals
Sense organs in the inner ear that contribute to equilibrium by responding to rotation of the head.
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