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aorta , gen and pl. aortae (a-or´ta, a-or´te) [NA]
A large artery of the elastic type which is the main trunk of the systemic arterial system, arising from the base of the left ventricle and ending at the left side of the body of the fourth lumbar vertebra by dividing to form the right and left common iliac arteries. The a. is formed from: ascending a.; aortic arch; and descending a., which is divided into the thoracic a. and the abdominal a.arteria aorta; [Mod. L. fr. G. aorte, from aeiro, to lift up]
abdominal a. the part of the descending a. that supplies structures below the diaphragm.pars abdominalis aortae [NA] , abdominal part of aorta, a. abdominalis;
a. abdomina´lis abdominal a
a. angus´ta congenital narrowness of a.
a. ascen´dens ascending a
ascending a. the part of the a. prior to the aortic arch from which arise the coronary arteries.a. ascendens, ascending part of aorta, pars ascendens aortae;
buckled a. pseudocoarctation
a. descen´dens descending a
descending a. a part of the a., further divided into the thoracic a. and the abdominal a.pars descendens aortae [NA] , a. descendens, descending part of aorta;
dynamic a. abnormally marked pulsations of a.
kinked a. pseudocoarctation
overriding a. a congenitally malpositioned a. whose origin straddles the ventricular septum and so receives ejected blood from the right ventricle as well as from the left; it is found especially in tetralogy of Fallot.
primitive a. the paired aortic primordia in young embryos.
pseudocoarctation of the a. a rare abnormality of the arch of the a. that constricts that vessel but is not a true coarctation in that there is no significant encroachment on the lumen.
shaggy a. a colloquial but fitting description for severe arterial degeneration of the aorta, the surface of which is extremely friable and likely to cause atheroembolism.
thoracic a. the part of the descending a. that supplies structures as far down as the diaphragm.pars thoracica aortae [NA] , a. thoracica, thoracic part of aorta;
a. thorac´ica thoracic a
ventral aortas the paired vessels ventral to the pharynx, which give rise to the aortic arches.
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