amniotic sac Directory References Discover Why Is Pluto No Longer a Planet? 9 Things You Might Not Know About Adolf Hitler The Lost Colony of Roanoke 6 Lost Civilizations Funky Feathers: 10 Bizarre Birds Secret Service Code Names of 11 U.S. Presidents Why We Celebrate MLK Day Contents amniotic sac anatomy Ask the Chatbot a Question Ask the Chatbot a Question Learn about this topic in these articles:formation and function In amnion…forming a fluid-filled cavity (the amniotic sac) that encloses the embryo. The amniotic sac and the fluid it contains are sometimes referred to as the bag of waters.Read More