Assertion: zygote's cell | /r/AtLocation | one wall of the blastocoel
Facets:
Source sentences:
text: about day 5 have 2 identifiable cell types and a fluid-filled cavity (blastoceol) outer cell layer - trophoblast , peripheral flattened cells, forms the placenta and placental membranes inner cell mass - embryoblast , mass of rounder cells located on one wall of the blastocoel, forms entire embryo