 All of these sinuses drain into the efferent lymphatic vessels to exit the node at the hilum on the concave side.These are channels within the node lined by endothelial cells along with fibroblastic reticular cells, allowing for the smooth flow of lymph.The endothelium of the subcapsular sinus is continuous with that of the afferent lymph vessel and also with that of the similar sinuses flanking the trabeculae and within the cortex.