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Learn about UF clinical research studies that are seeking volunteers. You can get a vaccine in many places in your community. Find a walk-up location or schedule an appointment today. Read more. The aorta is the largest blood vessel in the body. This artery is responsible for transporting oxygen rich blood from your heart to the rest of your body. The aorta begins at the left ventricle of the heart, extending upward into the chest to form an arch.
It then continues downward into the abdomen, where it branches into the iliac arteries just above the pelvis. Considering the significant portion of the body that the aorta spans, it is helpful to break it down into the following four sections:. The aortic root is the portion of the aorta that is attached to the heart. A major part of the aortic root is the aortic valve, which allows blood to flow from the heart to the rest of the body when it is open and prevents blood from flowing backwards into the heart when it is closed.
Spryngerd M, et al. Screening program of abdominal aortic aneurysm. Abdominal aortic aneurysms AAA. Merck Manual Professional Version. Abdominal aortic aneurysm: Screening. Preventive Services Task Force. Accessed July 20, Braswell Pickering EA. Allscripts EPSi. Mayo Clinic. July 23, Connolly HM expert opinion. It has a number of important relationships and branches, which very commonly appear in exam questions. The abdominal aorta is a continuation of the descending thoracic aorta.
It supplies all of the abdominal organs , and its terminal branches go on to supply the pelvis and lower limbs. It also supplies the undersurface of the diaphragm and parts of the abdominal wall. The abdominal aorta begins at T12 and ends at L4 , where it divides into the right and left common iliac arteries.
It enters the abdomen through the aortic opening of the diaphragm , which is located beneath the median arcuate ligament between the crura of the diaphragm at T It is accompanied through the aortic opening by the azygos vein and the thoracic duct.
The abdominal aorta is located on the posterior abdominal wall in the retroperitoneal space of the abdomen. It descends on the left of the inferior vena cava IVC over the anterior surface of the bodies of the lumbar vertebrae and follows the curvature of the lower spine. Because it lies slightly to the left of the midline , and due to the presence of the IVC next to it, right-sided arteries are longer than their left-sided equivalents, as they have further to travel. This means that, for example, the right renal artery is longer than the left.
Running parallel to the aorta on its right-hand side is the inferior vena cava , the cisterna chyli , the beginning of the azygos vein , and the para-aortic lymph nodes. Running on its left-hand side is the left sympathetic trunk and the para-aortic lymph nodes. Organs situated directly in front of the aorta include the stomach , duodenum and pancreas. It is also crossed anteriorly by the splenic vein and the left renal vein.
Trauma to the abdominal aorta can result from either blunt trauma e. Table of Contents. Clinical Significance.
The abdominal aorta gets wider and less flexible as we get older. The Anatomy of the Aorta. Was this page helpful? Thanks for your feedback! Sign Up. What are your concerns?
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