Polar bears are known to possess two very thick layers of fur and a lot of fat or “blubber” under their skin dermis layer. This adaptations help the polar bear to keep the thermodynamically changing heat outside the environment to keep it constant or at a higher rate than in the internal environment of the polar bear.
Why do polar bears have two thick layers of fur Class 7?
Polar bears have white fur (to protect them from their predators and helps them in catching prey). They have two thick layers of fur to prevent from extreme cold. They also have layer of fat under the skin.
Why does a polar bear need thick fur?
Polar bears have a layer of fat that can be four inches (10 cm) thick. Although their fur is the primary source of insulation, the fat helps keep heat in as well.
Do polar bears eat penguins?
Polar bears do not eat penguins, since penguins live in the southern hemisphere and polar bears live in the northern hemisphere.
What is the average lifespan of a polar bear?
LIFE CYCLE: Polar bears can live up to 25 or 30 years in the wild.
Do grizzly bears have thick fur?
Their thick fur keeps them warm, and the webbing between their toes makes them good swimmers. Unlike other bears, they have fur on the soles of their feet. Grizzly bears can dig up most of their food and can catch fish with their long claws. They also have a distinctive hump between their shoulders.
Why do polar bears need to have a thick for and fat body to survive in the North Pole?
The Arctic is the coldest place inhabited by land mammals and these have very thick fur, which insulates the body by trapping air. They also have a layer of stored fat under the skin which gives additional insulation.