Which structure is commonly called the bag of waters (it breaks prior to delivery and often signals the onset of labor)?
A)Primary germ layers
B)Morula
C)Amniotic sac
D)Blastocyst

Question

Quizplus · Accepted Answer

The amniotic sac is commonly known as the bag of waters in which the developing embryo/fetus is enclosed. It contains amniotic fluid and the sac ruptures prior to delivery, usually signaling the onset of labor. A - Primary germ layers refer to the three layers of cells formed during gastrulation, which eventually give rise to all the different tissue types in the developing embryo. B - Morula is the early stage of embryonic development consisting of a solid ball of cells formed by repeated cell division after fertilization. D - Blastocyst is the stage of embryonic development that occurs 5-7 days after fertilization, characterized by the formation of a fluid-filled cavity (blastocoel) and differentiation of cells into the inner cell mass and trophoblast.

Which Structure Is Commonly Called the Bag of Waters (It