And that means those digestive enzymes released by the Corian eventually break down the maternal blood vessels found within the endometrium. And as soon as we rupture these blood vessels, the blood of the mother actually oozes out and leaks out into the endometrium, into the area surrounding these Corianic villi. And so we have the pooling of the mother's blood shown in the diagram as this light purple section. And what that allows is it allows the exchange of nutrients and waste products and minerals and oxygen, carbon dioxide between the blood of that fetus and the blood of the mother, as we'll see in just a moment. So this entire diagram basically describes the components of our placenta. We have the Coriane that comes from the Trophy blast.