The polar bear has a thick layer of fur that helps to insulate it from the cold. The fur is made up of two layers: a dense undercoat and a longer, coarser outer layer. The undercoat is made up of fine, woolly hairs that trap air and help to keep the polar bear warm. The outer layer is made up of longer, stiffer hairs that help to protect the polar bear from the wind and snow.
Skin
The polar bear's skin is also thick and well-insulated. The skin is rich in blood vessels, which help to keep the polar bear warm. The skin also contains a layer of fat that helps to insulate the polar bear.
Ears
The polar bear's ears are small and rounded, which helps to reduce heat loss. The ears are also covered in fur, which helps to keep them warm.
Feet
The polar bear's feet are large and flat, which helps to distribute the bear's weight and prevent it from sinking into the snow. The feet are also covered in fur, which helps to keep them warm.
Claws
The polar bear's claws are long and sharp, which helps it to grip the ice and snow. The claws are also curved, which helps the polar bear to dig into the ice and snow.
Tail
The polar bear's tail is short and stubby, which helps to reduce heat loss. The tail is also covered in fur, which helps to keep it warm.
Body Size
The polar bear is a large animal, which helps to conserve heat. The polar bear's body is also round, which helps to minimize surface area and reduce heat loss.