More details on pseudocoel please?!

Pseudocoelom In some protostomes, the embryonic blastocoele persists as a body cavity. These protostomes have a fluid filled
main body cavity unlined or partially
lined with tissue derived from
mesoderm. This fluid-filled space
surrounding the internal organs serves several functions like distribution of
nutrients and removal of waste or
supporting the body as a hydrostatic skeleton. Pseudocoelomates Pseudocoelomate is no longer considered a valid taxonomic group , since it is not monophyletic . However, it is still used as a descriptive term. A pseudocoelomate is any invertebrate animal with a three- layered body and a pseudocoel. The
coelom was apparently lost or reduced
as a result of mutations in certain types of genes that affected early development. Thus, pseudocoelomates evolved from coelomates. [2] Important characteristics: lack a vascular blood system diffusion and osmosis circulate nutrients and waste products
throughout the body. lack a skeleton hydrostatic pressure gives the body
a supportive framework that acts as
a skeleton. no segmentation body wall epidermis and muscle often syncytial usually covered by a secreted cuticle most are microscopic parasites of almost every form of life
(although some are free living) Examples of pseudocoelomates Nematoda (roundworms ) Rotifera (rotifers) Kinorhyncha Nematomorpha, nematomorphs, or horsehair worms Gastrotricha Loricifera Priapulida Acanthocephala (spiny-headed worms) Aschelminth animals Entoprocta

parasitology