1:1 scale model of a thoracic aorta with a congenital malformation.
The ascending aorta, the aortic arch and the descending aorta are depicted.
From the aortic arc 4 rami originate instead of 3: the right subclavian and right common carotid artery show different origins, so that the brachiocephalic trunk (innominate artery) is absent.