I am tempted to say that the **nervous system **processes the stimuli, or to be more specific, the neurons that go across our nervous system.
Nervous system, and of course it's hub, the brain
The structure that typically processes stimuli in the body is the brain, specifically the thalamus, which acts as a relay station for sensory information. After receiving stimuli through sensory receptors, signals are transmitted to the thalamus, which then routes them to specific regions of the cortex for processing. This enables the brain to interpret and respond to stimuli effectively.
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