Placental Functions are Concentrated in a Disc-Shaped Area in the Endometrium

Question

Placental functions are concentrated in a disc-shaped area in the endometrium called the
A) trophoblast.
B) allantois.
C) capsular decidua.
D) basal decidua.
E) parietal decidua.

Accepted Answer

Placental functions are concentrated in the basal decidua, which is a layer of the endometrium that is located beneath the placental disc. The trophoblast is a layer of cells in the developing embryo that gives rise to the placenta. The allantois is a membrane that is involved in the formation of the umbilical cord and bladder in the developing embryo. The capsular and parietal decidua are layers of the endometrium that surround the embryo and are involved in the formation of the maternal part of the placenta.