Warm-Blooded and Cold-Blooded Animals

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Presentation transcript:

Warm-Blooded and Cold-Blooded Animals 6-3.3 Compare the response that a warm-blooded (endothermic) animal makes to a fluctuation in environmental temperature with the response that a cold-blooded (ectothermic) animal makes to such a fluctuation.

Warm-blooded vs. Cold-blooded Animals that are vertebrates differ in their abilities to regulate body temperature. They are either warm-blooded OR cold-blooded.

Warm-blooded (endothermic) Birds and Mammals maintain a constant internal temperature and does not change with the temperature of the environment .

Warm-blooded (endothermic) When the temperature is hot, an endothermic animal cools off by sweating, panting, changing position, or changing location. Sweating and panting generate heat loss through evaporating water. Changing position and location allow the animal to find a cooler environment in the shade or shelter.

Warm-blooded (endothermic) Must eat much more often than ectothermic animals since it takes energy to maintain a constant body temperature. For example, a lion must eat its weight in food every seven to ten days.

Cold-blooded (ectothermic) Fish, amphibians, and reptiles, have an internal body temperature that changes with the temperature of the environment.

Cold-blooded (ectothermic) They must gain heat to perform internal activities like digestion. If the environment is cold, ectothermic animals become slow moving and sluggish. Some animals must bask in the sun like snakes or lizards or move to a warmer area like some fish before they can move to hunt for food.

Cold-blooded (ectothermic) If the temperature gets too hot, ectothermic animals will need to find a cooler temperature or burrow in the ground to keep its body cool. They take on the temperature of their surroundings so they don't have to use food energy to keep warm. This means they don't have to eat as often.