Posterior Cerebral Artery. Long shunned by Neuroangio for no fault of its own, the PCA is now getting the attention it richly deserves. The PCA is an old vessel, in fact emerging in the lower species prior to development of the MCA.
River Otters are mammals that are relatives of the stoats, weasels, mink, badgers and wolverines. These groups of mammals are known as Mustelids. The Mustelids all have one thing in common, they all have scent glands that they use to mark off their territory. In the wild they live less than 10 years; in captivity they live 10 - 15 years. Range/Habitat: River otters are found along rivers, streams, and lakes and also in estuaries, coastal bogs, and large marine waterways such as Puget Sound and the Strait of Juan de Fuca.
There are also other types of otters, such as the river otter, but sea otters are distinctly different from other otters. They are adapted to living their entire lives in the water, whereas other otters live on land and merely hunt in water.Unlike other marine mammals, such as seals and dolphins, sea otters do not rely on a layer of fat to insulate their bodies from the cold water. Instead, they have a thick fur which keeps them warm.Adult sea otters average about 1.3 meters (4 feet) in length and about 20-45 kilograms (45-100 pounds) in weight.n fact, sea otters help create kelp beds, by eating urchins and other kelp-eating animals. Otters are usually found congregated together into groups called rafts. Male otters form separate rafts from female otters. Not all otters live in rafts.