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  4. Muscles are confined to body wall, absent in alimentary canal in

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Q. Muscles are confined to body wall, absent in alimentary canal in

NTA AbhyasNTA Abhyas 2020

Solution:

A pseudocoelomate is an organism in which the body cavity is not derived from the mesoderm, as we see in a true coelom, or body cavity. A pseudocoelomate is also known as a blastocoelomate. The body cavity is derived from the blastocoel. A true coelom is lined with a peritoneum which functions to separate the fluid from the body cavity. In a pseudocoelomate (false coelom), the body fluids bath the organs, and receive their nutrients and oxygen from the fluid in the cavity. Pseudocoelom is a persistent primary body cavity. Muscles are confined to body wall, absent in alimentary canal in Pseudocoelomate. Eg: Aschelminthes.