part of olfactory nerve development cranial nerve morphogenesis olfactory nerve morphogenesis CN I morphogenesis GO:0021627 biological_process The process in which the anatomical structure of the olfactory nerve is generated and organized. The olfactory nerve is a collection of sensory nerve rootlets that extend down from the olfactory bulb to the olfactory mucosa of the upper parts of the nasal cavity. This nerve conducts odor information to the brainstem.