Editing Olm (section)

====Chemoreceptors====
[[Image:P anguinus-head1.jpg|thumb|right|The front part of the olm's head carries sensitive chemo-, mechano-, and electroreceptors.]]

The olm is capable of sensing very low concentrations of organic compounds in the water. They are better at sensing both the quantity and quality of prey by smell than related amphibians.<ref name="HUP01">Hüpop K. (2000). ''How do cave animals cope with the food scarcity in caves?''. In: Culver D.C. ''et al.'' (ed.): ''Ecosystems of the world: Subterranean Ecosystems'', pp. 159–188. Amsterdam: Elsevier</ref> The nasal [[epithelium]], located on the inner surface of the nasal cavity and in the [[Jacobson's organ]], is thicker than in other amphibians.<ref name="DC01">{{cite journal | last1 = Dumas | first1 = P | year = 1998 | title = The olfaction in Proteus anguinus | journal = Behavioural Processes | volume = 43 | issue = 2| pages = 107–113 | doi = 10.1016/s0376-6357(98)00002-3 | pmid = 24895999 | s2cid = 20825148 }}</ref> The [[taste buds]] are in the [[mucus|mucous]] epithelium of the mouth, most of them on the upper side of the [[tongue]] and on the entrance to the gill cavities. Those in the oral cavity are used for tasting food, where those near the gills probably sense chemicals in the surrounding water.<ref>{{Cite journal |last1=Istenič |first1=L. |last2=Bulog |first2=B. |year=1979 |title=The structural differentiations of the buccal and pharyngeal mucous membrane of the Proteus anguinus Laur |journal=Biološki Vestnik |volume=27 |pages=1–12}}</ref>