People have upper-nostril skin areas, with molecule shape, size, and vibration receptors {smell, anatomy}. Smell uses more than 30 odor-receptor types, each with variations, making a thousand combinations. Smell-neuron axons go to older mammal-forebrain rhinencephalon, near frontal lobe, not to thalamus as other sense axons do. Invertebrates have skin odor receptors.
Odor receptors send to olfactory-bulb glomeruli, which send to cortical regions.
Consciousness>Consciousness>Sense>Smell>Anatomy
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Date Modified: 2022.0224