Mesoderm lining the coelom forms mesothelium. Separation of Peritoneal and Pleural Cavities: In the adult, peritoneal and pleural cavities are separated by the diaphragm. The diaphragm isformed by a septum transversum, paired pleuroperitoneal folds, and somatic mesoderm.
MYTH: AIDS is not caused by HIV. DEBUNKING: This is the biggie, of course. As long ago as 1983, researchers first isolated HIV from people with AIDS. By 1985, they had developed a test showing that the overwhelming majority of people with AIDS have antibodies to HIV in their blood.
In North America, AIDS is blamed on the health effects of unprotected anal sex and poppers on homosexual men, an argument which does not account for AIDS in drug-free heterosexual women who deny participating in anal sex. In this case, HIV/AIDS denialists claim the women are having anal sex but refuse to disclose it.