12 MEDICAL DEVICE REGULATIONS In Canada, devices of classes III and IV are subject to in-depth regulatory scrutiny,while class II devices require only the manufacturerâs declaration of device safety andeffectiveness before sale.
No problem: Polar bears in the study were seen swimming distances of 90 miles without any problems - and some bears went a lot further Scientists discovered that during the summer months, when sea ice is at its minimum, the bears were swimming farther and for longer periods of time than ever before in search of new hunting grounds.
But most experts agree that polar bears are the longest bears, as males may measure over 10 feet (3 meters) when standing on their hind legs. Small bumps on the pads of a polar bearâs large, wide paws may add traction and help the bear walk on slippery ice.