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Foetal Membranes Development Quiz

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Questions and Answers

What is the floor of the amnion formed by?

Amnioblast

Trophoblast

Epiblast (correct)

Yolk sac

What is the source of amniotic fluid in the early stage?

Trophoblast

Amnioblasts (correct)

Yolk sac

Chorion

Which structure forms a covering for the umbilical cord?

Amnion (correct)

Chorion

Allantois

Yolk sac

What are the structures developed from the zygote but do not share in the formation of the embryo?

Trophoblast (B) Signup and view all the answers

What happens to the amniotic cavity as the embryo develops?

Gradually increases in size at the expense of extraembryonic coelom and yolk sac cavity. (D) Signup and view all the answers

What is the floor of the amnion formed by?

Epiblast (C) Signup and view all the answers

What helps in elongation of the umbilical cord?

Rapid enlargement of the amniotic cavity (C) Signup and view all the answers

What is the source of the amniotic fluid in the early stage?

Amnioblasts (A) Signup and view all the answers

Which structure becomes separated from the trophoblast and is surrounded by extraembryonic mesoderm?

Amnion (C) Signup and view all the answers

What forms a covering for the umbilical cord and loosely covers the fetal surface of the placenta?

Amnion (B) Signup and view all the answers

Study Notes

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.

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Description

Test your knowledge on the development of foetal membranes from the zygote that do not share in the formation of the embryo. Identify structures such as trophoblast, amnion, yolk sac, allantois, connecting stalk, and chorion.