Give a scientific reason: Aschelminthes are called pseudocoelomates.

(N/A) In the animals of phylum $Aschelminthes$,the body cavity is not lined by mesoderm. Instead,the mesoderm is present as scattered pouches between the ectoderm and endoderm. This type of body cavity is called a pseudocoelom,and the animals possessing it are known as pseudocoelomates.