Question

How is pseudocoelom formed?

Answer 1

The space between the two layers of mesoderm is referred to as coelom.
During the development of pseudocoelomates, mesoderm occupies only a part of blastocoel adjoining the ectoderm.The blastcoel or segmentation cavity fails to disappear in the adult. It persists in the adult in between the body wall and the alimentary canal in the form of ‘pseudocoelom’.