EVERYDAY SCIENCE

Detailed explanation-1: -These are the organisms that have false body cavities. They have a fluid-filled body cavity separating the gut of the organism from the body wall but it is not lined by mesoderm, unlike true coelomates. All the organisms belonging to Aschelminthes are pseudocoelomates.

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.

Detailed explanation-5: -The pseudocoelomates include the nematodes, rotifers, gastrotrichs, and introverts. Some members of some other phyla are also, strictly speaking, pseudocoelomate.