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Where are human olfactory receptors located inside the nose?

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Compound eye — Senses Vespid wasps (Vespidae), similar to other insects, have compound eyes that consist of thousands of tiny optical units known as ommatidia, which contain light-sensitive photoreceptor cells.

In humans, olfactory receptors are located within the olfactory epithelium, a specialized region of the mucous membrane lining the upper part of the nasal cavity.123

These sensory cells are clustered in the back of the nasal cavity, specifically situated in the area above the superior turbinate bone. This region is distinct from the respiratory portion of the nose, which serves primarily to filter, warm, and moisten inhaled air. The olfactory receptors are embedded in the epithelium, where they possess fine, hair-like extensions called cilia that are bathed in a thin layer of mucus. When odor molecules dissolve in this fluid, they stimulate the receptors, which then transmit signals directly to the olfactory bulb in the brain via the olfactory nerve fibres.2413