part_of part of part of results in acquisition of features of results in acquisition of features of blood vessel endothelial cell blood vessel development cell differentiation endothelial cell differentiation blood vessel endothelial cell differentiation 2009-08-11T03:47:36Z GO:0060837 The process in which a relatively unspecialized cell acquires specialized features of a blood vessel endothelial cell, a thin flattened cell that lines the inside surfaces of blood vessels. biological_process dph