Answer / Chandra Prakash Yadav

The cells produced in the first stage of the embryonic development are called blastomeres or blastulas. The process is known as cleavage.

Explain pericardium?

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What are pleura?

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Explain monozygotic and dizygotic twins?

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Explain archenteron?

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After the morula stage what is the next stage? What is the morphological feature that defines that stage?

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What are extra embryonic membranes?

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What is placenta?

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Are all animals coelomate?

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Explain coeloms. From which germ layer does it originate?

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Explain gastrulation?

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Is there exchange of cells between the mother and the fetus through the placenta?

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