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An ectotherm (from Ancient Greek ἐκτός (ektós) ' outside ' and θερμός (thermós) ' heat '), more commonly referred to as a "cold-blooded animal", [1] is an animal in which internal physiological sources of heat, such as blood, are of relatively small or of quite negligible importance in controlling body temperature. [2]
Cold-blooded is an informal term for one or more of a group of characteristics that determine an animal's thermophysiology. These include: Ectothermy, controlling body temperature through external processes, such as by basking in the sun; Poikilothermy, the ability of an organism to function over a wide internal temperature range
Li'l Abner was a satirical American comic strip that appeared in multiple newspapers in the United States, Canada, and Europe.It featured a fictional clan of hillbillies living in the impoverished fictional mountain village of Dogpatch, USA.
Ruthless, cold-blooded, and treacherous. Considers himself the most sophisticated and handsome of Decepticons. Believes Decepticons should rely more on guile and speed rather than brute force to defeat Autobots. Fastest flyer of the group, can reach Mach 2.8 and an altitude of 52 miles.
Further examinations of animals traditionally classified as cold-blooded have revealed that most creatures manifest varying combinations of the three aforementioned terms, along with their counterparts (ectothermy, poikilothermy, and bradymetabolism), thus creating a broad spectrum of body temperature types.
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The rapid rate of speciation and evolution found in dinosaurs is typical of warm-blooded animals and atypical of cold-blooded animals. [ 5 ] The hypothesized population ratios of predatory dinosaurs to their prey is a signature trait of warm-blooded predators rather than cold-blooded ones.
This reflects the lower surface area to volume ratio in large animals, which reduces rates of heat loss. While extant mesotherms are relatively rare, good examples include tuna , lamnid sharks (e.g., the great white shark ), the leatherback sea turtle , some species of bee , [ 4 ] naked mole rats , hyraxes , and echidnas .