EVERYDAY SCIENCE

Detailed explanation-1: -endoderm, are known as pseudocoelom ate animals. The pseudocoelom is basically a fluid-filled body cavity lying inside the external body wall that bathes the internal organs, including the alimentary system and the reproductive system.

Detailed explanation-2: -Pseudocoelomate animals have a pseudocoel, (literally “false cavity”) which is a fully functional body cavity. Tissue derived from mesoderm only partly lines the fluid filled body cavity of these animals. Thus, although organs are held in place loosely, they are not as well organized as in a coelomate.

Detailed explanation-3: -A pseudocoelomate is an organism with body cavity that is not derived from the mesoderm, as in a true coelom, or body cavity. A pseudocoelomate is also known as a blastocoelomate, as the body cavity is derived from the blastocoel, or cavity within the embryo.

Detailed explanation-4: -A false coelom is the body cavity that is not completely lined by layers of epithelial cells (peritoneum) on the inner and outer sides. The animals belonging to the phylum Aschelminthes or Nematoda are pseudocoelomates. For example, roundworms, etc.