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Questions and Answers
What is the floor of the amnion formed by?
What is the floor of the amnion formed by?
What is the source of amniotic fluid in the early stage?
What is the source of amniotic fluid in the early stage?
Which structure forms a covering for the umbilical cord?
Which structure forms a covering for the umbilical cord?
What are the structures developed from the zygote but do not share in the formation of the embryo?
What are the structures developed from the zygote but do not share in the formation of the embryo?
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What happens to the amniotic cavity as the embryo develops?
What happens to the amniotic cavity as the embryo develops?
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What is the floor of the amnion formed by?
What is the floor of the amnion formed by?
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What helps in elongation of the umbilical cord?
What helps in elongation of the umbilical cord?
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What is the source of the amniotic fluid in the early stage?
What is the source of the amniotic fluid in the early stage?
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Which structure becomes separated from the trophoblast and is surrounded by extraembryonic mesoderm?
Which structure becomes separated from the trophoblast and is surrounded by extraembryonic mesoderm?
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What forms a covering for the umbilical cord and loosely covers the fetal surface of the placenta?
What forms a covering for the umbilical cord and loosely covers the fetal surface of the placenta?
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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.
