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Gigantothermy (sometimes called ectothermic homeothermy or inertial homeothermy) is a phenomenon with significance in biology and paleontology, whereby large, bulky ectothermic animals are more easily able to maintain a constant, relatively high body temperature than smaller animals by virtue of their smaller surface-area-to-volume ratio. [1]
Feathered theropods are probably the best candidates for dinosaur endothermy, yet the examined theropods had relatively low body temperatures 32.0 °C (89.6 °F). Large sauropods had higher body temperatures 37.0 °C (98.6 °F), which may be reflective of mesothermic gigantothermy.
Thermographic image: a cold-blooded snake is shown eating a warm-blooded mouse. Warm-blooded is an informal term referring to animal species whose bodies maintain a temperature higher than that of their environment.
The group that includes mammals and birds, both "warm-blooded" homeothermic animals (in red) is polyphyletic.. Homeothermy, homothermy or homoiothermy [1] is thermoregulation that maintains a stable internal body temperature regardless of external influence.
Various patterns of behavior enable certain ectotherms to regulate body temperature to a useful extent. To warm up, reptiles and many insects find sunny places and adopt positions that maximise their exposure; at harmfully high temperatures they seek shade or cooler water.
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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.
Skull of E. mirabilis. Estemmenosuchus could reach a body length of more than 3 m (10 ft). [2] Its skull was long and massive, up to 65 cm (26 in) in length, [2] and possessed several sets of large horns, somewhat similar to the antlers of a moose, growing upward and outward from the sides and top of the head.