Endothermic and Ectothrmic Animals SC 6-3.3. Vertebrate Animals All animals respond to changes in...

Endothermic and Endothermic and Ectothrmic AnimalsEctothrmic Animals

SC 6-3.3

Vertebrate AnimalsVertebrate Animals

All animals respond to changes in the environmental temperature.

Vertebrate animals differ in their abilities to regulate body temperature.

Vertebrate AnimalsVertebrate Animals

There are two different types of vertebrate animals, and they respond changes in temperature based on this type.

Two types of vertebrates: ◦Endothermic (warm-blooded)◦Ectothermic (cold-blooded)

Endothermic AnimalsEndothermic Animals

Animals which maintain a nearly constant internal temperature and do not change with the environment.

When the outside temperature is too hot, an endothermic animal can cool off by

◦Sweating◦Panting◦Changing Position◦Changing Location

Endothermic AnimalsEndothermic Animals

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.

Endothermic AnimalsEndothermic Animals

Endothermic animals must eat much more often than ectothermic animals since it takes energy to maintain a constant body temperature.

Example: ◦A lion must eat its weight in food every seven

to ten days.

Endothermic AnimalsEndothermic Animals

Types of Endothermic animals:

◦Birds

◦Mammals

Endothermic AnimalsEndothermic Animals

Ectothermic AnimalsEctothermic Animals

Animals which have an internal body temperature that changes with the temperature of the environment.

They must gain heat to perform internal activities.

◦Example: Digestion

Ectothermic AnimalsEctothermic Animals

If the environment is cold, ectothermic animals become slow moving and sluggish.

Some animals must bask in the Sun.◦Example: Snakes or Lizzards

Some animals must move to a warmer area before they can move about or hunt for food. ◦Example: Some Fish

Ectothermic AnimalsEctothermic Animals

If the temperature is too hot, ectothermic animals will need to find a cooler temperature or burrow into the ground to keep its body cool.

Ectothermic AnimalsEctothermic Animals

Ectothermic animals 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.

Ectothermic AnimalsEctothermic Animals

Types of Ectothermic Animals:

◦Fish

◦Amphibians

◦Reptiles

Ectothermic AnimalsEctothermic Animals

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