Foetal Membranes Development Quiz

Amnion and Embryonic Development

• The floor of the amnion is formed by the epiblast.
• In the early stage, the source of amniotic fluid is the osmotic transfer from maternal blood.
• The umbilical cord is covered by the amnion.
• Structures developed from the zygote that do not share in the formation of the embryo are the amnion, chorion, and yolk sac.
• As the embryo develops, the amniotic cavity expands and separates from the chorion.
• The epiblast forms the floor of the amnion.
• Elongation of the umbilical cord is helped by the growth of the embryo and the expansion of the amniotic cavity.
• The source of amniotic fluid in the early stage is the osmotic transfer from maternal blood.
• The embryo becomes separated from the trophoblast and is surrounded by extraembryonic mesoderm.
• The amnion forms a covering for the umbilical cord and loosely covers the fetal surface of the placenta.