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| | VI. The Arteries. 2. The Aorta. Gray, Henry. 1918. Anatomy of the Human Body. |
 | | At the union of the ascending aorta with the aortic arch the caliber of the vessel is increased, owing to a bulging of its right wall. |
 | | These conditions persist, to some extent, in the adult, where His found that the average diameter of the spindle exceeded that of the isthmus by 3 mm. |
 | | Distinct from this diffuse and moderate stenosis at the isthmus is the condition known as coarctation of the aorta, or marked stenosis often amounting to complete obliteration of its lumen, seen in adults and occuring at or near, oftenest a little below, the insertion of the ligamentum |
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