The physical adaptations that help polar bears survive include :
- FUR : their thick fur keeps them warm in frigid air and water (it's actually hollow)
- WHITE FUR: actually transparent, for camouflage in ice and snow. Also reflects the heat lost through the skin, back into it's body.
- SKIN: their skin is black to absorb heat from the sun's rays to help keep them warm
- PAWS : the pads provide traction on ice
- BIG PAWS : spread body weight on ice, and are broad for use in swimming
- CLAWS : are curved to dig through ice
- SMALL EARS and TAILS : are short to minimize heat loss
- TEETH : more jagged than most bears, suiting a carnivore
- FAT LAYERS: keeps them warm (insulates)
- NOSTRILS : their nostrils close underwater