1 Pseudocoelomate animals have a pseudocoelom (literally âfalse cavityâ), which is a fully functional body cavity. 2  Tissue derived from mesoderm only partly lines the fluid filled body cavity of these animals.n 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.
POLIO is a highly contagious, life-threatening disease with no cure, and while there are vaccinations to prevent it available, ahead of World Polio Day, the World Health Organisation is now advising countries prepare to give out lower doses to make stocks last. 07:50, Mon, Oct 24, 2016 | UPDATED: 09:56, Mon, Oct 24, 2016. GETTY.
Polio, also called poliomyelitis is a highly contagious infectious disease caused by one of three related viruses. Polio is a very serious disease, which can lead to paralysis or even death. Once a person is exposed to polio, it usually takes about three to five days for symptoms to appear. In about 95 percent of polio cases, infection from the polio virus causes no symptoms or serious effects. In about 5 percent of cases, the polio virus manifests in a mild form (abortive polio) with flu-like symptoms, in a nonparalytic form (aseptic meningitis) or in a severe form called paralytic polio. People who have minor or nonparalytic forms recover completely.