Biology Practicals Class 12
Blastula: A Stage in Embryonic Development
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- 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.
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