What is the prenatal organ that joins the pregnant woman and the developing embryo during the second week of prenatal development?

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The placenta is a prenatal organ that joins the pregnant female and developing embryo during the second week of prenatal development.It develops from the interactions of the trophoblast layer and endometrial tissue.Its formation and the associated developing umbilical circulation permit selective exchange of soluble bloodborne substances between them.After its creation,the bilaminar disc is suspended in the uterus's endometrium between two fluid-filled cavities: the amniotic cavity,which faces the epiblast layer,and the yolk sac,which faces the hypoblast layer and serves as initial nourishment for the embryonic disc.During the beginning of the third week of prenatal development within the embryonic period,the primitive streak forms within the bilaminar disc,a furrowed,rod-shaped thickening in the middle of the disc.

What Is the Prenatal Organ That Joins the Pregnant Woman