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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
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.
The flight muscles need to be kept at a suitable temperature for the dragonfly to be able to fly. Being cold-blooded, they can raise their temperature by basking in the sun. Early in the morning, they may choose to perch in a vertical position with the wings outstretched, while in the middle of the day, a horizontal stance may be chosen.
Most sharks are "cold-blooded" or, more precisely, poikilothermic, meaning that their internal body temperature matches that of their ambient environment. Members of the family Lamnidae (such as the shortfin mako shark and the great white shark ) are homeothermic and maintain a higher body temperature than the surrounding water.
Heterothermy or heterothermia (from Greek ἕτερος heteros "other" and θέρμη thermē "heat") is a physiological term for animals that vary between self-regulating their body temperature, and allowing the surrounding environment to affect it.
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Sloths are solitary animals that rarely interact with one another except during breeding season, [41] though female sloths do sometimes congregate, more so than do males. [42] Sloths descend about once every eight days to defecate on the ground. The reason and mechanism behind this behavior have long been debated among scientists.