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Related to aorta: abdominal aorta, thoracic aorta, Overriding aorta, Aorta dissection


(āôr`tə), primary artery of the circulatory systemcirculatory system,
group of organs that transport blood and the substances it carries to and from all parts of the body. The circulatory system can be considered as composed of two parts: the systemic circulation, which serves the body as a whole except for the lungs, and the
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 in mammals, delivering oxygenated blood to all other arteries except those of the lungs. The human aorta, c.1 in. (2.54 cm) in diameter, originates at the left ventricle of the heartheart,
muscular organ that pumps blood to all parts of the body. The rhythmic beating of the heart is a ceaseless activity, lasting from before birth to the end of life. Anatomy and Function

The human heart is a pear-shaped structure about the size of a fist.
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. After supplying the coronary arteries that nourish the heart itself, the aorta extends slightly toward the neck to feed branches serving the head and arms. It then arches down toward the waist, directing blood into the arterial system of the chest. Entering the abdomen through the aortic hiatus, an opening in the diaphragm, the aorta branches off to supply the stomach, kidneys, intestines, gonads, and other organs through extensive arterial networks. It finally divides into the two iliac arteries carrying blood to the legs. The elasticity of the aorta wall permits it to pulse in rhythm with the heartbeat, thus helping to propel blood through the body.



the main artery of the greater circulatory system, which supplies blood to all organs of the body.

The wall of the aorta consists of three membranes, that is, the interior (a layer of endothelial cells), intermediate (numerous rows of elastic fibers), and exterior (bundles of connective tissue fibers). Because of the elasticity of the aorta’s walls an uninterrupted flow of blood in the arteries is assured. In man, mammals, and birds, the aorta emerges from the left ventricle of the heart, forming an enlargement at its very beginning, called the aortic spindle, goes up (ascending aorta), turns back and to the left in man and mammals (arch of the aorta) and back and to the right in birds, and goes down (descending or dorsal aorta). In reptiles there are two aortic arches, that is, the right, or arterial, arch, emerging from the left ventricle of the heart; and the left, or venous, arch from the right ventricle. When they unite, they form a common aorta with mixed blood. In amphibians an arterial cone emerges from the only ventricle, and from it one pair (in ecaudates) or two pairs (in caudates) of aortic arches branch out, which form the dorsal aorta when they unite. In fishes and cyclostomes the ventricle passes into the abdominal aorta, which carries venous blood through the system of arterial arches into the gills (in fishes) and gill pouches (in cyclostomes). The blood which is oxygenated there is collected in the dorsal aorta. Of the invertebrates, mollusks and arthropods have aortas.


Ostroverkhov, G. E., D. N. Lubotskii, and Iu. M. Bomash. Kurs operativnoi khirurgii i topograficheskoi anatomii,2nd ed. Moscow, 1964.
Cole, W. H. Textbook of Surgery,8th ed. New York, 1963.


The main vessel of systemic arterial circulation arising from the heart in vertebrates.
(invertebrate zoology)
The large dorsal or anterior vessel in many invertebrates.


the main vessel in the arterial network, which conveys oxygen-rich blood from the heart to all parts of the body except the lungs
References in periodicals archive ?
Coarctation of the Aorta in the Elderly: Case Report and Review of the Literature.
He added: "Treatment of thoraco-abdominal aortic aneurysms, complex aneurysms that span across both the thoracic aorta in the chest and the abdominal aorta, usually consists of open surgery, which carries a significant risk of death because of the complexity of the operation.
CoA--coarctation aorta, PDA--patent ductus arteriosus, RT3D--real-time 3-dimensional, TTE--transthoracic echocardiography, TEE--transesophageal echocardiography
The most widely accepted theory suggests that in nonpenetrating chest traumas, sudden high-velocity deceleration is accompanied by hyperflexion of the spine leading to sudden chest compression and traction on the aortic isthmus, the point at which the mobile aortic arch meets the fixed proximal descending thoracic aorta (16-22).
The saccular aneurysm of the thoracic aorta was embedded in the gastric conduit.
However, what we have been doing, along with select institutions around the country, is using a stent graft to restore the normal continuity of blood flow to the aorta.
Although the exact cause of aortic dissection is unknown, risk factors include high blood pressure and some genetic abnormalities of the aorta, including Marfan syndrome.
the children's aorta were impaired even though other measures of heart health such as blood lipid levels and blood pressure were not dramatically different.
Anterior chest, neck and throat pain mimicking angina may be secondary to abnormalities related to the ascending aorta, whereas back and abdominal pain often indicate descending aortic injury.
The aorta is a major blood vessel about the width of a garden hose that runs from the heart through the chest and abdomen, according to the Mayo Clinic Web site.
The drug losartan may prevent lethal damage to the aorta in people with a genetic disorder called Marfan syndrome, preliminary findings suggest.