Assertion: placenta | /r/HasAspect | maternal component
Facets:
Source sentences:
text: The placenta has a maternal component (Decidua Basalis) and a fetal component (Chorionic Plate with Chorionic Villi).
text: Placentation begins once the conceptus begins to implant in the uterine wall and the placenta will have both a fetal and a maternal component.