<Tr> <Th> TH </Th> <Td> H3. 11.07. 0.01003 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> An olfactory receptor neuron (ORN), also called an olfactory sensory neuron (OSN), is a transduction cell within the olfactory system . </P> <P> Humans have about 10 million olfactory receptor neurons . In vertebrates, ORNs are bipolar neurons with dendrites facing the external surface of the cribriform plate with axons that pass through the cribriform foramina with terminal end at olfactory bulbs . The ORNs are located in the olfactory epithelium in the nasal cavity . The cell bodies of the ORNs are distributed among all three of the stratified layers of the olfactory epithelium . </P>

Where are the olfactory receptor neurons are located