Describe the Trophoblast

Multiple Choice

Describe the trophoblast.

A) The trophoblast is the cell layer surrounding the blastocyst.
B) The trophoblast is the fluid-filled chamber filled with amniotic fluid.
C) The trophoblast is a solid ball of cells.
D) The trophoblast is the inner cavity within the blastocyst.
E) The trophoblast is a pre-embryo at the four-cell stage.