Blue whales have long and streamlined bodies with the head making up a fourth of its body length. The head region is broad and U-shaped. Blue whales do not have teeth. Instead, they have 270 - 395 plates of baleen on either side of their jaw.Baleen look like long thin teeth placed very close to one another.he head region is broad and U-shaped. Blue whales do not have teeth. Instead, they have 270 - 395 plates of baleen on either side of their jaw. Baleen look like long thin teeth placed very close to one another.
Hives frequently occur following an infection or as a result of an allergic reaction such as to medication, insect bites, or food. Psychological stress, cold temperature, or vibration may also be a trigger. In half of cases the cause remains unknown. Risk factors include having conditions such as hay fever or asthma.
What Causes Hives. Hives result from dilation of capillaries allowing fluid to leak out into the surrounding tissue, the epidermis. They resolve when the body absorbs this fluid. The border of a hive is described as polycyclic, or made up of many circles, and changes as fluid leaks out and then is absorbed.