How does the polar bear adapt to heat or cold?
A thick layer of fat more than 10 cm protects the bears polar against the cold extreme. Also, bears polar have a thick, water-repellent coat, each hair of which is hollow and leads the heat rays of the sun directly on their black skin.
Its extremities, particularly its feet, are equipped with sorts of blood radiators which make it possible to maintain their temperature one or two degrees above 0°C. They therefore cannot freeze and heat loss is minimal.
Its hump allows it to regulate its temperature, so as not to get too hot, and its blood remains fluid to prevent the increase in heat (unlike other mammals whose blood becomes more viscous (less fluid) when the heat increased). It can also turn fat into water.
In the country, these animals are hunted both for their meat and their thick white fur. The Canadian government and conservation groups have long argued that the hunt at thepolar bear was sustainable in Canada.
The polar bear feeds mainly on seals that it waits at the edge of the holes in the pack ice that they use to breathe. His way of life (moving on the ice, hunting, etc.) inspired the peoples Inuit who seek to the to copy.
Moreover, compared to other bears, the bear polar has features that help it resist cold. For example, its shorter tail and smaller ears prevent it from losing too much heat. Its longer snout allows it to warm the air before it reaches the lungs.
tardigrade The tardigrade, animal misunderstood, resist to cold, warm and can even survive in space. Researchers have just unlocked the secret of its resistance. A tardigrade.