A connective tissue capsule with small arterioles surrounds the lobules. The capsule projects septa or trabeculae into the organ. Blood vessels (trabecular arterioles and venules) within the trabeculae gain access to the thymics epithelial stroma.The cortex contains thymic epithelial cells froming an interconnected three-dimensional network supported by collagen fiber. Thymic epithelial cells, linked to each other by desmosome, surround capillaries