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.
Even the inside of the ear is covered with fur to protect against the cold temperatures. When a bear dives underwater the ear canals close (Brown 1993, p 81). Smell: Polar bears have an excellent sense of smell and can locate seals up to 40 miles away (Brown 1993, p 82).