The decrease in Arctic ice as a result of global warming has already taken its toll on polar bears , leaving them with fewer habitats and increased difficulty in finding food. But scientists have now discovered a larger, and potentially more lethal, threat to the Arctic mammal. They discovered that the immune system of polar bears is unable to adjust to new pathogens that have come about as a result of rising temperatures. Professor Diana Weber at New College of Florida, together with a large group of international researchers, studied the immune system of 98 polar bears in Canada. It has already been documented that pathogens have been moving into the Arctic as a result of global warming.
Polar Bear Digestive System – Adaptations , Diagram & Anatomy
Polar Bear Name and Evolution - Polar Bears International
The bear can afford to consume as much fats as it possibly can to survive in the frigid Arctic weather. The polar bear digestive system is highly efficient especially in assimilating fat-rich diet. Sometimes the stomach cannot digest large amount of protein in a way it should which is probably due to the presence of seal hair. Polar bear might have swallowed some of its hair while grooming which could become hindrance during digestion. The typical stomach efficiency is was Ice bears never rely on protein-rich diet as a matter of fact adults fancy eating only the blubber of ringed seals while the young bears consume only the meat.
Polar bears have adapted well to life on the ice, one of few large mammals that have been able to do so. Their fur is thick with a warm undercoat and longer guard hairs above: clear, hollow tubes that transmit the sun's warmth directly to their black skin, where the heat is absorbed. It has a strong, muscular body. Its front paws are broad and there is fur on the undersides of its feet. It has a long neck and so its head can remain above water when it is swimming.
The polar bear's long muzzle is an adaptation to extreme cold. It allows the bears to breathe in subzero weather without harming their lungs. By Dr. Thea Bechshoft. How do polar bears avoid such troubles?