The aorta is the largest blood vessel in your body. The abdominal aorta supplies blood to the lower portions of the body including the legs. The Aorta And Its Branches Play With Hand Nurse Medical Knowledge Medical It is approximately 13cm long and ends at the level of the L4 vertebra. . It serves two main functions. The abdominal aorta is a continuation of the thoracic aorta beginning at the level of the T12 vertebrae. 8 A diameter greater than 40 cm is generally classified as aneurysmal Figs. These arteries and their branches supply all parts of the heart muscle with blood. Right aortic arch anomalies occur in 001 to 01 of the general population. Collectively they are the major arterial supply to the stomach spleen liver gall. Being the first segment of the systemic circulation the aorta originates directly from the heart. Blood returning to the. The aortic arch begins at the origin of the right innomina