Multiple choice

Germinal disc differentiate into two layers. Which of the options names it correctly?

  1. Outer epiblast of larger columnar cells and inner hypoblast of smaller cuboidal cells.

  2. Outer epiblast of larger cuboidal cells and inner hypoblast of smaller columnar cells.

  3. Outer epiblast of smaller cuboidal cells and inner hypoblast of larger columnar cells.

  4. Outer epiblast of smaller columnar cells and inner hypoblast of larger cuboidal cells.

  5. Outer hypoblast and inner epiblast.
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A Correct answer
Explanation

Cells of inner cell mass or embryonal knob get rearranged to form a flat embryonic disc or germinal disc. The latter differentiate into two layers, outer epiblast of large columnar cells and inner hypoblast of smaller cuboidal cells.

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