The trophoblast (from Greek trephein: to feed; and blastos: germinator) is the outer layer of cells of the blastocyst. Trophoblasts are present four days...

Extravillous trophoblasts (EVTs), are one form of differentiated trophoblast cells of the placenta. They are invasive mesenchymal cells which function...

intermediate trophoblast Chorionic-type intermediate trophoblast at chorionic laeve of fetal membrane, differentiated from villous intermediate trophoblast The...

blastocyst trophoblast to directly contact the underlying endometrium. Ultimately, the inner cell mass (also embryoblast), inside the trophoblast layer, is...

embryoblast which subsequently forms the embryo, and an outer layer of trophoblast cells called the trophectoderm. This layer surrounds the inner cell mass...

of cells called the trophoblast, and an inner cell mass. With further compaction the individual outer blastomeres, the trophoblasts, become indistinguishable...

off in the trophoblast once it has formed. The trophoblast cells form tight junctions between them making the structure leakproof. Trophoblast cells have...

the inner cell mass in eutherians. The pluriblast is distinct from the trophoblast, and gives rise to the germ layers of the embryo, as well as extra embryonic...

become the actual embryo. The external, surrounding cells develop into trophoblast cells, which only contribute to extra-embryonic tissues. At this stage...

13–15 days trophoblast only Secondary The villi increase in size and ramify, while the mesoderm grows into them. 16–21 days trophoblast and mesoderm...