aorta

(redirected from thoracic aorta)
Also found in: Dictionary, Thesaurus, Medical, Wikipedia.
Related to thoracic aorta: Posterior interventricular sulcus

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
..... Click the link for more information.
 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.
..... Click the link for more information.
. 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.

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.

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.

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
References in periodicals archive ?
Contrast-enhanced MR angiogram can be used to assess dimensions of the pulmonary arteries and thoracic aorta.
4,5,6,7] In our patient, the disease involved the infrarenal and descending thoracic aorta.
Furthermore, DS-CTA with ECG-gating provides high quality images with minor motion artifacts also in imaging of whole thoracic aorta (scan length 20-30 cm) (3).
Caption: Figure 1: The phenylephrine dose-response curve in the rats' thoracic aorta.
3%, the BA most commonly arises from the descending thoracic aorta between the T5 and T6 vertebrae [4].
The isolated thoracic aorta results were fitted and plotted using sigmoidal concentration-response curves.
TEE revealed LA with dense SEC (Figure 5), low ostial emptying velocities <20cm/sec and LAA with 2 lobes and small thrombi in both lobes (Figure 6) and one filamentous thrombus 16/6mm at the ostium of LAA, few thin thoracic aorta plaques but light SEC.
We are not only dealing with the thoracic aorta, but are taking the holistic view of the aorta as one organ," according to guidelines task force cochair Dr.
For several years, surgeons have been using minimally invasive techniques to implant a stent graft--a fabric tube enmeshed in a metal framework--for repair of less complex aneurysms of the lower abdominal aorta or the descending thoracic aorta, two regions of the aorta without branch vessels that supply blood to critical abdominal organs.
Endoleaks and new proximal and distal intimal tears in the thoracic aorta after stent -graft implantation are better identified by TEE as compared with angiography.
Coarctation of the aorta (coarctation) is most commonly a congenital abnormality that involves stenosis of the proximal descending thoracic aorta.
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.