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.
About Hives (urticaria). We explain the hives, the most common causes, symptoms, body parts most likely affected, treatment, & tips for controlling urticaria. The hives (urticaria) is a harmless type of rash or skin allergy that is usually caused by an allergy.The rash consists of circular, raised welts on the skin that are usually itchy and occur in batches. Hives can vary in size, from a few millimeters to several centimeters in diameter.he most common skin allergy triggers that cause hives include: â¢ Medication such as antibiotics, codeine, penicillin, sulfa, anticonvulsant drugs, phenobarbital, and aspirin. â¢ Foods like shellfish, nuts, tomatoes, soy, chocolate, and berries. â¢ Pollen.