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Poikilotherm is the opposite of homeotherm – an animal which maintains thermal homeostasis. In principle, the term could be applied to any organism, but it is generally only applied to vertebrate animals. Usually the fluctuations are a consequence of variation in the ambient environmental temperature.
Pages in category "Animal physiology" The following 74 pages are in this category, out of 74 total. This list may not reflect recent changes. A. Adaptation (eye)
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.
Knut Schmidt-Nielsen (1915–2007) was a major figure in vertebrate comparative physiology, serving on the faculty at Duke University for many years and training a large number of students . He also authored several books, including an influential text, all known for their accessible writing style.
Winter rest in an animal is different from true hibernation, since their metabolism is not reduced drastically. Body temperature is not significantly lowered, however their heart rate is reduced. This means that animals like the raccoon can quickly become active again if temperatures rise or the snow melts. [ 1 ]
Elastic mechanisms in animals are very important in the movement of vertebrate animals. The muscles that control vertebrate locomotion are affiliated with tissues that are springy, such as tendons, which lie within the muscles and connective tissue.
Limitations of animal running speed provides an overview of how various factors determine the maximum running speed. Some terrestrial animals are built for achieving extremely high speeds, such as the cheetah , pronghorn , race horse and greyhound , while humans can train to achieve high sprint speeds.
Instead, the embryo's behaviour and physiology combine, allowing the smallest embryos to control aspects of their own pre-hatching environment showing that the embryo is not simply a work in progress, but is a functioning organism with surprisingly sophisticated and effective behaviours.