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Question

The amnion of mammalian embryo is derived from


A

endoderm and mesoderm

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B

ectoderm and endoderm

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C

ectoderm and mesoderm

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D

mesoderm and trophoblast

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Solution

The correct option is C

ectoderm and mesoderm


The correct option is C.

Explanation of the correct option:

  1. The amniotic cavity, which is enclosed by the amnion, is where all the growing foetus develops.
  2. The amniotic cavity is surrounded by this membrane.
  3. On the inside side, the membrane is made up of extra somatic ectoderm, and on the outside side, it's composed of mesoderm.

Explanation of incorrect option:

Option A:

  1. Endoderm is the material that makes up the linings of the digestive and respiratory systems, as well as organs like the liver and pancreas.
  2. A range of cell types, including bone, muscle, and connective tissue, are directed by the mesoderm..

Option B:

  1. Endoderm is the material that makes up the linings of the digestive and respiratory systems, as well as organs like the liver and pancreas.
  2. Endoderm cells are responsible for forming the colon, stomach, intestines, lungs, liver, and pancreas.

Option D:

  1. Trophoblasts make up the outer layer of a blastocyst.
  2. They can be found four days after conception in humans.
  3. The mesoderm is responsible for the development of a wide range of cell types, including bone, muscle, and connective tissue.

Final answer:

The amnion of mammalian embryo is derived from ectoderm and mesoderm.


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