12 Key and Core Catalog With a mechanical key system, the level of security is determined by masterkey control. A masterkey system enables facilities of any size to manage the building by defining access by person and by area in increasing levels of complexity. Since BEST invented the standard for masterkey systems, there is no
When they occur in the upper part of the aorta, they are called thoracic aortic aneurysms. Aneurysms can occur anywhere in the thoracic aorta, including the ascending aorta near the heart, the aortic arch in the curve of the thoracic aorta and the descending aorta in the lower part of the thoracic aorta.
Answers.comÂ® is making the world better one answer at a time. Ectasia of the abdominal aorta is when the aorta (the large artery in the body that brings fresh blood from the heart to the rest of the body) in the abdomen (area of the body below the chest and above the waist and holds body organs like the stomach and bowels) is dilated or enlarged.