Biology Practicals Class 12

Blastula: A Stage in Embryonic Development

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About Simulation

  • In this simulation, learners will be introduced to the embryonic developmental stage in mammals known as blastula.
  • This zoology practical will help you to identify the prominent structure of the blastula stage of embryo development.
  • Analysis of different blastula structures is an interesting feature of this zoology practical. Students will understand in detail about blastocoel, the cavity present in the blastula, and its role.
  • Differentiation of the nourishing cell layer in the blastula stage called trophocytes is possible with the help of this biology experiment.
  • This biology experiment will deal with different terms related to embryonic development in the theory section.

Blastula, structure of blastula

Simulation Details

Duration – 30 Minutes
Easily Accessible
Language – English
Platforms – Android & Windows


The zygote is the first diploid cell developed by the union of male and female gametes, giving rise to the embryo.

The zygote progresses through a few cycles of mitosis to form the solid ball of cells known as the morula. Morula is an early-stage embryo enclosed inside zona pellucida.

A cavity eventually forms inside the cells as they continue to divide. And then, an 8–16 cell structure morula is transformed into a blastula.

The early embryo development stage results in the formation of a blastula and is called blastulation.

Blastula is an early metazoan embryo that often takes the shape of a hollow, spherical chamber and is filled with fluid along with a single layer of cells surrounding the fluid chamber. The fluid-filled cavity in the blastula is called blastocoel. The outer layer of cells nourishes the developing embryo and is called the trophoblast.

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Requirements for this Science Experiment

Permanent slide T.S. of blastula – chart/model Compound microscope

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