aorta

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Related to abdominal aorta: common iliac artery, celiac trunk

aorta

(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 Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Aorta

 

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.

REFERENCES

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 Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

aorta

[ā′ȯrd·ə]
(anatomy)
The main vessel of systemic arterial circulation arising from the heart in vertebrates.
(invertebrate zoology)
The large dorsal or anterior vessel in many invertebrates.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

aorta

the main vessel in the arterial network, which conveys oxygen-rich blood from the heart to all parts of the body except the lungs
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
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The left renal vein crosses over the abdominal aorta below the origin of the superior mesenteric artery and drains into the vena cava inferior.
Salmonella paratyphi B mycotic aneurysm of the abdominal aorta in an HIV-infected patient: a case report.
Tsu, "Surgical treatment of infected aneurysms and pseudoaneurysms of the thoracic and abdominal aorta," American Journal of Surgery, vol.
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Indian patients were found to have the disease involvement in the abdominal aorta involving the renal arteries subsequently extending into the thoracic aorta, whereas the Japanese patients had involvement of the aortic arch and its branches.
A common origin for these two arteries from the abdominal aorta is an extremely rare occurrence, reported in 0.25% of the population (Michels; Michels et al.).
The prevalence and distribution of the atherosclerotic plaques in the abdominal aorta and its branches.
The phase II study (EudraCT 014-000899-025) will evaluate the efficacy and safety of FP-1201-lyo compared against placebo to prevent multiple organ failure (MOF) following open surgery for ruptured abdominal aorta aneurysm.
The main theories on the origin of NCS include the presence of (1) an excessively acute angle between the SMA and the abdominal aorta [15], (2) an abnormally high course of the LRV [15], and (3) retro- or circumaortic variants of the LRV [8].
Primary aortoenteric fistula (PAEF) is a direct communication between the aorta and the intestinal lumen without prior reconstructive procedures on the abdominal aorta. Although rare with an estimated prevalence of 0.07% [1], PAEF is a severe life threatening emergency that should be promptly recognized.
A 68-year-old Caucasian woman recently diagnosed with CMML presented to our rheumatology office for evaluation of an abnormal chest computed tomography (CT) showing inflammation surrounding the entire thoracic and abdominal aorta. She was experiencing shortness of breath, fatigue, fevers, and night sweats for about four months previously.