Mediastinal branches of thoracic part of aorta Tags: Anatomical Structure, Artery.The mediastinal branches are numerous small vessels which supply the lymph glands and loose areolar tissue in the posterior mediastinum.This article incorporates text from a public domain edition of Gray’s Anatomy. branch from Thoracic aorta Dorlands prefix r_02 Dorlands suffix 12690827 Gray page 600 Gray subject 153 supplies Mediastinum Learn more... Loading...