It seems, then, that just as the visual system runs on a retinotopic map, the olfactory system runs on a chemotopic map.

For this reason, humans aren’t particularly aware of the richness of information that can be transmitted through the air, and can be perceived by a highly sensitive olfactory system.

But our 500 intact, coding olfactory receptor genes are still enough to provide a good olfactory system.

Receptor neurons and mitral cells located in the olfactory system adapt in response to odors.

The telencephalon forms from the dorsal parts of p6 and p5, where p6 becomes the olfactory system and p5 will coincide with the visual system.