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  • What is the relationship between germinal layers and the formation of the body cavity in case of coelomate acoelomates and pseudocoelomates

What is the relationship between germinal layers and the formation of the body cavity in case of coelomate, acoelomates and pseudocoelomates?

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Germinal layers are those layers which formed during the process of gastrulation. It is widely described into three layers-
1.-The outer layer is known as the ectoderm.
2.-The middle one is the endoderm.
3. The innermost is the endoderm.
Coelomates are described as organisms that possess coeloms, which are the body cavity lined by the mesoderm. Phylum Annelida, Mollusca, arthropods, etc. are examples of coelomates.
Acoelomates are the organisms with absent body cavities. E.g. Platyhelminthes. Instead of having a lining by mesoderm, some organisms will have them in the form of a scattered pouch located in between the ectoderm and endoderm. This type of body cavity is known as a pseudocoelome, and animals possessing pseudocoelome, are often referred to as pseudocoelomates, e.g., Ascaris.

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