what does I olfactory do for smell
The olfactory system is the sensory system used for olfaction, or the sense of smell.Most mammals and reptiles have two distinct parts to their olfactory system: a main olfactory system and an accessory olfactory system.lfactory neurons transduce receptor activation into electrical signals in neurons. The signals travel along the olfactory nerve. The olfactory nerve, similar to the optic nerve, is not part of the peripheral nervous system but is defined as a part of the brain.