What is the difference between Poikilothermic Animals and Homeothermic Animals?

Poikilothermic Animals:

1. Their body temperature varies with environmental temperature.

2. They are also called cold-blooded animals.

3. They get heat from the environment hence they are called ectothermal animals.

4. Hypothalamus does not act as thermoregulatory center in brain.

E.g. inverte-brates, Pisces, amphibians and reptiles.

Homeothermic Animals:

1. Body temperature remains constant.

2. They are also called warm-blooded animals.

3. They get heat from the body; hence they are called endothermic animals.

4. Hypothalamus acts as thermoregulatory center in brain.

E.g. Birds, mammals.