In anatomical sources, the aorta is usually divided into sections. One way of classifying a part of the aorta is by anatomical compartment, where the thoracic aorta (or thoracic portion of the aorta) runs from the heart to the diaphragm. The aorta then continues downward as the abdominal aorta (or abdominal portion of the aorta) diaphragm to the aortic bifurcation.
You can perform an allergy skin test on infants as young as six months, but they're not considered totally reliable in kids younger than two years old. Before going ahead with any type of skin test, a doctor usually takes a few factors into account.
Allergy testing measures how a person reacts to specific allergens, such as tree pollen, pet dander, foods, medications or molds. A positive allergy test means that a person has a specific allergic antibody to the substance tested. This often means that the person is allergic to the substance, meaning that the person will experience symptoms when exposed to the allergen.