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.
Urticaria, also known as hives, is an outbreak of swollen, pale red bumps or plaques (wheals) on the skin that appear suddenly -- either as a result of the body's reaction to certain allergens, or for unknown reasons. Hives usually cause itching, but may also burn or sting.cute urticaria: Hives lasting less than six weeks. The most common causes are certain foods, medications, or infections. Insect bites and internal disease may also be responsible. The most common foods that cause hives are nuts, chocolate, fish, tomatoes, eggs, fresh berries, and milk.