aorta


aorta
aortic, aortal, adj.
/ay awr"teuh/, n., pl. aortas, aortae /-tee/. Anat.
the main trunk of the arterial system, conveying blood from the left ventricle of the heart to all of the body except the lungs. See illus. under heart.
[1570-80; < ML < Gk aorté the great artery, lit., something hung, carried; akin to aeírein to lift, carry]

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Artery that carries blood from the heart to all the organs and structures of the body.

Where the left ventricle opens into the aorta, a valve prevents backflow of blood into the heart. The aorta ascends from the heart, arches over it to the left, then descends into the trunk. Arteries branch off along its length until it divides at hip level into arteries that go to the legs.

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      in vertebrates and some invertebrates, the blood vessel (or vessels) carrying blood from the heart to all the organs and other structures of the body.

      At the opening from the left ventricle into the aorta is a three-part valve that prevents backflow of blood from the aorta into the heart. The aorta emerges from the heart as the ascending aorta, turns to the left and arches over the heart (the aortic arch), and passes downward as the descending aorta. The left and right coronary arteries branch from the ascending aorta to supply the heart muscle. The three main arteries branch from the aortic arch and give rise to further branches that supply oxygenated blood to the head, neck, upper limbs, and upper part of the body. The descending aorta runs down through the posterior centre of the trunk past the heart, lungs, and esophagus, through an opening in the diaphragm, and into the abdominal cavity.

      In the chest the aorta, as it descends, gives off branches to (1) the pericardium, the sac that encloses the heart, (2) the connective tissues of the lungs, (3) the bronchi, which carry air from the windpipe into the lungs, (4) the esophagus, (5) part of the diaphragm, and (6) the chest wall.

      In the abdominal cavity the aorta gives off a number of branches, which form an extensive network supplying blood to the stomach, liver, pancreas, spleen, small and large intestines, kidneys, reproductive glands, and other organs. At the level of the fourth lumbar vertebra, which is about even with the top of the hip bones, the aorta divides into the right and left common iliac arteries, the principal arteries to the legs.

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Universalium. 2010.

Look at other dictionaries:

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  • aorta — f. anat. Arteria mayor del cuerpo, de la que nacen las demás arterias. Sale del ventrículo izquierdo del corazón, hacia arriba, describe un arco (cayado de la aorta) y desciende por delante de la columna vertebral hasta su bifurcación en las dos… …   Diccionario médico

  • aorta — (Del gr. ἀορτή, de ἀείρειν, elevar). 1. f. Anat. Arteria que nace del ventrículo izquierdo del corazón de las aves y de los mamíferos y es la mayor del cuerpo. 2. Zool. Cada una de las dos grandes arterias que nacen del ventrículo o ventrículos… …   Diccionario de la lengua española

  • aortă — AÓRTĂ, aorte, s.f. Cea mai mare arteră a corpului la vertebrate, care duce sângele oxigenat de la inimă în tot corpul. ♢ (Adjectival) Artera aortă. – Din fr. aorte. Trimis de ana zecheru, 13.09.2007. Sursa: DEX 98  aórtă s. f., g. d. art.… …   Dicționar Român

  • Aorta — Sf Hauptschlagader per. Wortschatz fach. (16. Jh.) Entlehnung. Entlehnt aus ml. aorta, dieses aus gr. aortḗ, eigentlich Angebundenes, Sack, Schlauch , dann als medizinischer Terminus für die Bronchien und die Hauptschlagader (weil sie vom Kopf… …   Etymologisches Wörterbuch der deutschen sprache

  • Aorta — A*or ta, n. [NL., fr. Gr. ?, fr. ? to lift, heave.] (Anat.) The great artery which carries the blood from the heart to all parts of the body except the lungs; the main trunk of the arterial system. [1913 Webster] Note: In fishes and the early… …   The Collaborative International Dictionary of English

  • Aorta — statusas T sritis Kūno kultūra ir sportas apibrėžtis Pagrindinė žmogaus arterija, išeinanti iš kairiojo širdies skilvelio. kilmė gr. aortē atitikmenys: angl. aorta vok. Aorta, f rus. аорта …   Sporto terminų žodynas

  • aorta — statusas T sritis Kūno kultūra ir sportas apibrėžtis Pagrindinė žmogaus arterija, išeinanti iš kairiojo širdies skilvelio. kilmė gr. aortē atitikmenys: angl. aorta vok. Aorta, f rus. аорта …   Sporto terminų žodynas

  • aorta — (n.) 1570s, from M.L. aorta, from Gk. aorte, term applied by Aristotle to the great artery of the heart, lit. what is hung up, from aeirein to lift, heave, raise, of uncertain origin; related to the second element in METEOR (Cf. meteor). Used… …   Etymology dictionary

  • Aorta — Aorta: Die medizinische Bezeichnung der Hauptkörperschlagader geht zurück auf gleichbed. griech. aortē̓. Das griech. Substantiv gehört zu griech. aeírein »zusammen , anbinden« und bedeutet demnach ursprünglich »das Anbinden, Anhängen«, dann im… …   Das Herkunftswörterbuch

  • aorta — sustantivo femenino 1. Área: anatomía Arteria principal del cuerpo que nace del ventrículo izquierdo del corazón. arteria aorta …   Diccionario Salamanca de la Lengua Española


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