part_of part of part of develops_from develops from develops from has developmental contribution from has developmental contribution from contributes to morphology of ascending aorta pars ascendens aortae UBERON:0001496 Wikipedia:Ascending_aorta EHDAA2:0000147 ascending thoracic aorta pars ascendens aortae MA:0002570 EMAPA:17014 aorta ascendens FMA:3736 SCTID:181299009 EHDAA:9828 The ascending aorta is the portion of the aorta in a two-pass circulatory system that lies between the heart and the arch of aorta[GO]. A portion of the aorta commencing at the upper part of the base of the left ventricle, on a level with the lower border of the third costal cartilage behind the left half of the sternum; it passes obliquely upward, forward, and to the right, in the direction of the heart's axis, as high as the upper border of the second right costal cartilage, describing a slight curve in its course, and being situated, about 6 cm behind the posterior surface of the sternum. The total length is about 5 cm in length [Wikipedia]. NCIT:C32150 thoracic aorta truncus arteriosus outflow tract aortic component aortic sac section of aorta