Why are there warm and cold blooded animals?

Answer 1

warm blooded animals create their own body heat, expending extra energy to do so.

cold blood animal rely on the the ambient temperate of surrounds for their body temperature, and expend less energy, but also get sluggish when things are cool to cold.

Answer 2

Warm-blooded animals keep a constant body temperature. This means they can be active at night, and up first on a cold morning. It also means they need a lot more food.

Warm-bloods tend to be more complex. The adaptation occurred separately in birds and mammals. Maybe also dinosaurs, this is disputed.

The curious extinct reptiles with 'sails' on their backs were related to the ancestors of mammals and it is thought this was a primative way to gain heat or lose it. Losing heat is part of it and most mammals sweat.

So-called cold blooded animals can't control their body temperature themselves. They will basically always be ath the same temperature as their surroundings.

If they get cold, they have to move somewhere warmer, or become sluggish.

If they get too warm, they can't sweat or cool themselves down (much), and will rely on moving into shade, or into water, or something like that to cool down.

Answer 3

Because humans are mammals and SOME animals are cold blooded because their reptiles or amphibian's.

* if i misspelled some words I'm only 10.

date 19/4/2010

Answer 4

animals need warm or cold blood to fit their habitat.

Answer 5

evolution