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Anatomy, Abdomen and Pelvis, Abdominal Aorta - NCBI Bookshelf The branches of the abdominal aorta: Paired branches: the middle adrenal, renal, gonadal, inferior phrenic, and lumbar arteries Unpaired branches: the coeliac, superior mesenteric, inferior mesenteric, and median sacral arteries Terminal branches: the common iliac arteries Go to: Embryology Aorta: Anatomy and Function - Cleveland Clinic The aorta has many sections, including the: Aortic root: Section that attaches to the heart. This is the widest part of the aorta. Aortic valve: Three flaps of tissue (leaflets) that snap open and shut to release oxygen-rich blood from the heart. Ascending aorta: Upward curve that occurs shortly after the aorta leaves the heart. Abdominal aortic aneurysm - Symptoms and causes - Mayo Clinic An abdominal aortic aneurysm is an enlarged area in the lower part of the major vessel that supplies blood to the body (aorta). The aorta runs from the heart through the center of the chest and ...