... the curving portion between the ascending aorta and the descending aorta. This structure gives rise to the brachiocephalic trunk, the left common carotid artery and the left subclavian artery. The plura
and anterior margins of the lungs
cover the arch of the aorta. The remains of the thymus
also contribute to the covering of the arch of the aorta. The arch of the aorta starts at the height of ...