Answer / Jyoti Agnihotri

Coelom is a body cavity found in most complex multicellular animals. It is a true cavity enclosed by a double-layered membrane called the mesoderm, and it serves as a site for internal organs such as the liver, pancreas, spleen, intestines, and kidneys.

Explain coeloms. From which germ layer does it originate?

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What is polyembryony?

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Are all animals coelomate?

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After the blastula stage what is the following stage of the embryonic development? How is the passage from blastula to the next stage called?

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What organogenesis?

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What are the archenteron and the blastopore?

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What is the stage of the embryonic development in which these structures are formed?

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What stage follows gastrulation?

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After the morula stage what is the next stage?

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From which germ layer do the epidermis and the nervous system originate?

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Explain histogenesis?

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Nmae extra embryonic membranes layers in vertebrates?

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