This is known as the emeon. So the Emeon is an extra embryonic membrane that directly surrounds that developing embryo. And in this diagram, the Emeon is this blue structure here. Now, the Emeon actually consists of two layers. The outer layer is the layer that comes from the mesoderm germ layer, but the inner layer comes from the actoderm germ layer. Now, the Amneon basically produces the cells of the amnion produce a special type of watery fluid that is released into the amniotic cavity in the space between the amyon itself and that growing embryo.