morphogenesis of an endothelium epithelial tube morphogenesis endothelial tube morphogenesis GO:0061154 biological_process The process in which the anatomical structures of a tube are generated and organized from an endothelium. Endothelium refers to the layer of cells lining blood vessels, lymphatics, the heart, and serous cavities, and is derived from bone marrow or mesoderm. Corneal endothelium is a special case, derived from neural crest cells. dph 2010-06-15T09:05:00Z