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(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 ?
Acute aortic dissection is known as the most dangerous aortic disease,[sup][1],[2],[3] with management and prognosis determined as the disruption of the medial layer provoked by intramural bleeding.
Whenever possible, greater proximal and distal coverage should be used to prevent late stent graft migration and endovascular leak due to aortic disease progression.
5) Predisposing factors for acute aortic dissection include advanced age, chronic hypertension and underlying aortic diseases, including arteritis, aortic arch hyperplasia, stenosis, a bicuspid aortic valve and trauma.
Leading organisations in Aortic Diseases research include:
Acute aortic syndromes are defined as a sudden occurrence of chest or back pain that is caused by an aortic disease.
Cook's recent achievements in aortic intervention, and the unparalleled pipeline of advanced devices we have coming in the next few years, are a testament to our commitment to bringing to market the most innovative technologies for treating aortic diseases," said Phil Nowell, global leader of Cook Medical's Aortic Intervention strategic business unit.
A 50-year-old male patient suffering one of the most deadly types of aortic diseases was saved using a unique new medical device combination under development by Cook Incorporated.
Ultimately, the use of this technology may be expanded to manage a variety of challenging aortic diseases with less risk and offers new hope for improved results over current treatment of patients.
Several studies have indicated that emergency ultrasound at the bedside is beneficial in rapidly diagnosing a variety of conditions, such as abdominal pain, ruptured ectopic pregnancies, vascular emergencies, and aortic diseases, improving quality of care and patient satisfaction.
Robbins said he looks forward to departmental research advancements in minimally invasive coronary bypass and valve operations, novel surgical procedures for the treatment of congestive heart failure and less invasive procedures for the treatment of patients with aortic diseases and atrial fibrillation.