Question

Give the name of animal group having Pseudocoelom. And their characteristics

Answer 1

psdocoelomate (sōō´dōsē´ləmāt´), any of a group of invertebrates with a three-layered body that has a fluid-filled body cavity (pseudocoelom) between the endoderm and the mesoderm (the innermost and middle tissue layers). The pseudocoelom is contrasted with the coelom of mollusks, annelid worms, and the more complex animals (including humans and other vertebrates). Pseudocoelomates lack a circulatory system, and the pseudocoelom itself lacks the endothelial lining of a coelom. The hydrostatic pressure of the pseudocoelom gives the body a supportive framework that acts as a skeleton. Nematodes or roundworms (see Nematoda), rotifers (see Rotifera), acanthocephalans (spiny-headed worms), kinorhynchs (see Kinorhyncha) and nematomorphs or horsehair worms (see Nematomorpha) are pseudocoelomates.

Answer 2

Pseudocoelomate is the animal group name having pseudocoelom.

Characteristics:

• Pseudocoelomate are the invertebrates which have three layered fluid-filled body cavity in between the endoderm and mesoderm.  

• The body cavity is formed from the blastocoels. A coelom is lined with the peritoneum.

• It has no circulatory system and also it has no endothelial lining in the coelom.  

• It has hydrostatic pressure in the pseudocoelom which gives them support and act as a skeleton.  

• Nematodes or roundworms, acanthocephalans, nematomorphs, rotifers are the examples of the pseudocoelomates.