Assertion: aorta's part | /r/HasAspect | four segments
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Source sentences:
text: 14.1 shows the two distinct parts of the aorta: thoracic and abdominal [5–8]. Thoracic aorta extends from aortic annulus to the diaphragm and has four segments: segment I—aortic root, comprising aortic annulus, interleaflets triangles, semilunar leaflets, three Valsalva sinuses, and sino-tubular junction; segment II—tubular segments of the aorta subdivided in IIa, from the sino-tubular junction to the level of the right pulmonary artery, and IIb, from the right pulmonary artery to the brachiocephalic artery; segment III—aortic arch, from the brachiocephalic artery to the ligamentum arteriosum, including the origin of the major neck vessels; and segment IV—descending thoracic aorta, subdivided in IVa, from the ligamentum arteriosum to the pulmonary artery, and IVb, from the pulmonary artery to the diaphragm .