Editing Heat exchanger (section)

===Carotid rete===
Carotid rete is a counter-current heat exchanging organ in some [[ungulate]]s. The blood ascending the [[carotid arteries]] on its way to the brain, flows via a network of vessels where heat is discharged to the veins of cooler blood descending from the nasal passages. The carotid rete allows [[Thomson's gazelle]] to maintain its brain almost 3&nbsp;°C (5.4&nbsp;°F) cooler than the rest of the body, and therefore aids in tolerating bursts in metabolic heat production such as associated with outrunning [[cheetah]]s (during which the body temperature exceeds the maximum temperature at which the brain could function).<ref>{{cite web|url=https://asknature.org/strategy/carotid-rete-cools-brain/|title=Carotid rete cools brain : Thomson's Gazelle}}</ref> Humans with other primates lack a carotid rete.<ref name="Bruner Mantini Musso De La Cuétara 2010 pp. 35–43">{{cite journal |last1=Bruner |first1=Emiliano |last2=Mantini |first2=Simone |last3=Musso |first3=Fabio |last4=De La Cuétara |first4=José Manuel |last5=Ripani |first5=Maurizio |last6=Sherkat |first6=Shahram |date=2010-11-30 |title=The evolution of the meningeal vascular system in the human genus: From brain shape to thermoregulation |journal=American Journal of Human Biology |volume=23 |issue=1 |pages=35–43 |doi=10.1002/ajhb.21123 |pmid=21120884 |issn=1042-0533}}</ref>