Now, the second function of the Corianne is to create these Corianic extensions. And these Corianic extensions permeate through the endometrium and eventually they connect with the blood vessels of that female individual and the Coriane. These Corianic extensions eventually develop into a structure known as the placenta. And the placenta plays a role in exchanging the nutrients, the oxygen and the waste products between that developing fetus, developing embryo and that mother. So these are the two functions of the Corian. Now let's move on to the embryonic membrane, the extra embryonic membrane that actually encloses that fetus itself.