The aorta then continues downward as the abdominal aorta (or abdominal portion of the aorta) from the diaphragm to the aortic bifurcation.Īnother system divides the aorta with respect to its course and the direction of blood flow. 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. In anatomical sources, the aorta is usually divided into sections. Structure Sections Course of the aorta in the thorax (anterior view), starting posterior to the main pulmonary artery, then anterior to the right pulmonary arteries, the trachea and the esophagus, then turning posteriorly to course dorsally to these structures. The aorta distributes oxygenated blood to all parts of the body through the systemic circulation. ![]() The aorta ( / eɪ ˈ ɔːr t ə/ ay- OR-tə PL: aortas or aortae) is the main and largest artery in the human body, originating from the left ventricle of the heart, branching upwards immediately after, and extending down to the abdomen, where it splits at the aortic bifurcation into two smaller arteries (the common iliac arteries). (entire body with exception of the respiratory zone of the lung which is supplied by the pulmonary circulation) Parietal branches: Inferior phrenic arteries Lumbar arteries Median sacral artery Visceral branches: Celiac trunk Middle suprarenal arteries Superior mesenteric artery Renal arteries Gonadal arteries ( testicular in males, ovarian in females) Inferior mesenteric arteryĬommon iliac arteries Median sacral arteryĬombination of coronary sinus, superior vena cava and inferior vena cava Left bronchial arteries Esophageal arteries to the thoracic part of the esophagus Third to eleventh posterior intercostal arteries and the subcostal arteries ![]() Truncus arteriosus, fourth left branchial artery, paired dorsal aortae (combine into the single descending aorta)īrachiocephalic trunk Left common carotid artery Left subclavian artery
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