Final answer:
Olfaction begins in the olfactory epithelium where odorants are absorbed into the mucus lining where olfactory neurons are. Attached to these neurons are cilia, of which there are three main types, with at least 10K of each type! The axons of these neurons bundle together to form the olfactory tract which extend into the brain, specifically to the olfactory cortex in the temporal lobe, where olfactory information is first processed.
Step-by-step explanation:
Olfaction begins in the olfactory epithelium, where odorants are absorbed into the mucus lining where olfactory neurons are. Attached to these neurons are cilia, of which there are three main types, with at least 10K of each type! The axons of these neurons bundle together to form the olfactory tract which extend into the brain, specifically to the olfactory cortex in the temporal lobe, where olfactory information is first processed.