Editing Endotherm (section)

== Regional endothermy ==
Some [[ectotherm]]s, including several species of [[fish]] and [[reptile]]s, have been shown to make use of regional endothermy, where muscle activity causes certain parts of the body to remain at higher temperatures than the rest of the body.<ref name=":0">{{Cite book|title=Environmental Physiology of Animals| vauthors = Willmer P, Stone G, Johnston I |publisher=Wiley|year=2009|isbn=978-1-4051-0724-2 |pages=[https://archive.org/details/environmentalphy00will/page/190 190]|url-access=registration|url=https://archive.org/details/environmentalphy00will/page/190}}</ref> This allows for better locomotion and use of the senses in cold environments.<ref name=":0" />