ABSTRACT
The olfactory or receptor cells are bipolar neurons that have a peripheral process (the olfactory rod), from which project 10-30 fine hairs or cilia, and several central processes (or olfactory filia) which are fine unmyelinated fibers that converge to form small fascicles enwrapped by Schwann cells, and pass through openings in the cribriform plate of the ethmoid bone into the olfactory bulb. Collectively, the central processes of the olfactory receptor cells constitute the olfactory nerve.
