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Published byAlfred Douglas Modified over 7 years ago
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Homeostasis the physical process that maintains a stable internal environment. (example: body temperature)
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Endotherms animals that can generate & regulate their own body heat. Their body temperature stays at a relatively constant level by balancing heat loss with heat production. sometimes referred to as “warm-blooded”
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Minimize Heat Loss Heat loss is minimized in most mammals by having a thick coat of fur or thick layer of fat beneath the skin.
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Making Some Heat Digestion- Endotherms have to eat fairly often because they burn calories to support their body temperature as well as other functions. Shivering – An involuntary movement that generates heat.
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Cool it! Find a cool spot Pant Sweat Reduce Activity Levels (Rest)
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All Ears! Radiator ears are a special adaptation Some animals have large ears that have blood vessels close to the surface of the skin. If the outside temperature is cooler, heat is released through the ears.
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Ectotherms animals that rely on environmental sources of heat. sometimes called “cold blooded” animals, are poorly insulated and produce heat at a low rate compared with endotherms. They also lose heat to cooler surroundings quickly. regulate their body temperatures by behaviors.
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Regulate Body Temperature Many ectotherms are able to regulate their body temperature behaviorally, by moving into and out of sunlight. burrowing under ground /seeking shade Moving in and out of water.
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They Just Don’t Need the Calories! They therefore eat only 1/3 to 1/10 of the food needed by endothermic animals. an ectotherm has all this energy available for activity, growth, repair and reproduction. http://www.statemaster.com/encyclopedia/Ectothermic Don’t eat very often.
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Types of Ectotherms Reptiles Amphibians Fish Insects
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How? Snakes and lizards sunning themselves on rocks.Snakeslizards Fish changing depths in the water to find a suitable temperature.Fish Desert animals burrowing beneath the sand during the day.Desert Insects that warm their flight muscles by vibrating them in place.Insects
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