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An endotherm (from Greek ἔνδον endon "within" and θέρμη thermē "heat") is an organism that maintains its body at a metabolically favorable temperature, largely by the use of heat released by its internal bodily functions instead of relying almost purely on ambient heat. Such internally generated heat is mainly an incidental product of the animal's routine metabolism, but under conditions of excessive cold or low activity an endotherm might apply special mechanisms adapted specifically to heat production. Examples include special-function muscular exertion such as shivering, and uncoupled oxidative metabolism, such as within brown adipose tissue.Only birds and mammals are extant universally endothermic groups of animals. Certain Argentine black and white tegu, leatherback sea turtles, lamni

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  • داخلية الحرارة (ar)
  • Endothermes Tier (de)
  • Endotermia (es)
  • Endotherm (en)
  • Endotherme (fr)
  • Endotermia (biologia) (it)
  • Endotermia (pt)
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  • داخلية الحرارة (باليونانية: Endotherm)‏ (تعني: endon = ἔνδον = «داخلي»؛ thermē = θέρμη = «حرارة»). وهي كائنات حية مصادرها الداخلية الفسيولوجية للحرارة في عملية الأيض. وذلك بإطلاق الحرارة بواسطة وظائف الجسد الداخلية بدلا من الاعتماد على العوامل الخارجية. ولكن في حالة البرد القارس أو قلة النشاط فإن «داخليات الحرارة» تطبق بعض الآليات الخاصة لتكييفها وإنتاج الحرارة. ومن الأمثلة على ذلك الوظائف الخاصة كارتجاف العضلات، أيض تفكك الأكسدة الذي يحدث الأنسجة الدهنية السمراء. (ar)
  • Les organismes endothermes produisent de l'énergie thermique (chaleur) grâce à leur métabolisme interne afin de contrôler leur température corporelle . Ces organismes sont à opposer aux ectothermes. De nombreux organismes endothermes sont également homéothermes. Néanmoins, ce n'est pas une règle générale et il existe aussi des organismes endothermes et poïkilothermes. Par exemple, colibris et chauve-souris sont des endothermes poïkilothermes capables de suspendre leur thermorégulation pendant les périodes nocturnes et hivernales. (fr)
  • In biologia, l'endotermia (dal greco: endon = da dentro; thermos = calore) è la condizione degli organismi viventi la cui temperatura corporea è regolata dalla produzione di calore metabolico interno. È un tipo di termoregolazione. Il suo contrario è chiamato ectotermia. (it)
  • An endotherm (from Greek ἔνδον endon "within" and θέρμη thermē "heat") is an organism that maintains its body at a metabolically favorable temperature, largely by the use of heat released by its internal bodily functions instead of relying almost purely on ambient heat. Such internally generated heat is mainly an incidental product of the animal's routine metabolism, but under conditions of excessive cold or low activity an endotherm might apply special mechanisms adapted specifically to heat production. Examples include special-function muscular exertion such as shivering, and uncoupled oxidative metabolism, such as within brown adipose tissue.Only birds and mammals are extant universally endothermic groups of animals. Certain Argentine black and white tegu, leatherback sea turtles, lamni (en)
  • Un endotermo (del griego ἔνδον endon "dentro" y θέρμη thermē "calor") es un organismo que mantiene su cuerpo a una temperatura metabólicamente favorable, en gran parte por el uso de calor liberado por sus funciones corporales internas en lugar de depender casi exclusivamente del calor ambiental. Dicho calor generado internamente es principalmente un producto secundario del metabolismo rutinario del animal, pero en condiciones de frío excesivo o baja actividad, un endotermo puede aplicar mecanismos especiales adaptados específicamente a la producción de calor. Los ejemplos incluyen el ejercicio muscular de función especial, como los escalofríos, y el metabolismo oxidativo no acoplado, como en el tejido adiposo marrón. Solo las aves y los mamíferos son grupos de animales universalmente endot (es)
  • A endotermia pode ser definida como a manutenção de temperaturas corpóreas altas e constantes, geradas pelo próprio metabolismo. Os animais endotérmicos, em comparação aos ectotérmicos (animais cuja manutenção da temperatura corpórea é dependente de fontes de calor do ambiente), possuem a temperatura do corpo geralmente maior que a do ambiente e normalmente são organismos mais ativos. A capacidade de gerar calor endógeno é encontrada em diversos animais, até mesmo em ectotermos em intensa atividade muscular, mas apenas em mamíferos e aves a endotermia é observada em condições de repouso. A endotermia surgiu independentemente em aves e mamíferos, de maneira convergente, mas como poucos caracteres associados à endotermia são preservados em fósseis, a compreensão de como se deu a origem da en (pt)
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  • http://commons.wikimedia.org/wiki/Special:FilePath/Homeothermy-poikilothermy.png
  • http://commons.wikimedia.org/wiki/Special:FilePath/Thermal_Regulation_Graph.svg
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