part of part of tunica media blood vessel elastic tissue blood vessel external elastic membrane in FMA this is classified as an acellular membrane, which is inconsistent with our classification as a tissue layer. Requires further investigation NCIT:C32555 outer elastic lamina EMAPA:36302 UBERON:0015433 MA:0002862 A thin layer of fibrous tissue capable of stretching and contracting. It is part of the tunica media of the blood vessels. external elastic membrane external elastic lamina FMA:68206