Linked from
The 14 pages that link to Olfactory bulb, each with the reason it gives.
AnosmiaBroader topic: Damage can block or distort signals arriving from the nose.
OdorantBroader topic: It processes neural patterns produced by odorant-activated receptors.
Olfactory systemBroader topic: It is the first major brain relay for smell signals.
OdorBroader topic: It begins transforming receptor activity into odor representations.