why do penquins feet never freeze?

Answer 1

How do penguins stay warm?
The only penguin that has to cope with extreme cold is the Emperor penguin. Like all penguins, the Emperor has a thick layer of insulating feathers which are designed to keep them warm in water, remembering that heat loss in water is much greater than in air. In addition to this, the Emperor has the largest body mass of all penguins, which further reduces relative surface area and heat loss. They also are able to control blood flow to their extremities, reducing the amount af blood which gets cold, but still keeping the extremities from freezing. In the intense antarctic winter, the male Emperor penguins (the females are at sea) huddle together to keep warm and rotate position to make sure everyone gets a turn at being on the cold edge.

Getting cold is not really a problem for most penguin species, most have trouble staying cool when out of the water. Penguins often hold their flippers out to radiate heat and make their feathers stand up to flush out some of the warm air trapped within. Some species have bare patches of skin on the face with which to radiate heat, while others nest underground or in forest.


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i typed a bit to much

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Answer 2

The system that stops a penguin's foot from freezing is very elaborate and sophisticated and employs two mechanisms.

The first one allows the penguin to control the rate of blood flowing to its feet by varying the diameter of arterial vessels supplying the blood. In cold conditions the flow is reduced, when it is warm the flow increases.

The second mechanism takes the form of 'counter current heat exchangers' at the top of the legs. The arteries, which supply warm blood and oxygen to the penguin's feet break up into many small vessels which are closely linked to similar numbers of venous vessels bringing cold blood back from the feet. So, when heat is lost from the arterial vessels, the venous vessels running in the opposite direction pick it up and carry it back through the body, rather than out through the feet. This means that in the very remote regions of the skin, cells get oxygen but heat isn't lost through this skin.

If you found that interesting, you can buy the New Scientist book from Amazon. There was a similar book out last year called "Does anything eat wasps?"

Answer 3

They have to get refilled with anti-freeze twice a year.

Answer 4

It's all that dancing they do... Happy Feet? lol

Answer 5

because they dont have feet...they have fins