And that fluid, which is found inside the cavity of the uterus is used to basically initiate the process known as blastulation. So once the moral is inside that cavity of the uterus, it undergoes blastulation to form a blastocyst. Now, recall that a blastocyst consists of three important structures. We have the blastoceal, which is the hollow cavity inside the blastocyst that contains a nutritious fluid that is needed by that developing embryo to actually develop further. We also have a structure known as the trophy blast and the inner cell mass. Now, the cells part of the trophy blast eventually give rise to a structure known as the corian, as well as the placenta, while the cells of the inner cell mass eventually give rise to the actual organism itself.