The term 'Embryonic Membranes' refers to two membranes that form around the embryo during pregnancy. The first membrane is the amnion, which is a thin, transparent membrane that encloses the embryo and its fluid-filled sac. The second membrane is the caul, which is a thin, white membrane that covers the head and neck of the fetus. Both of these membranes are important for protecting the developing embryo and providing a safe environment for growth.