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.
The popular explanations include extreme poverty, lack of HIV education, and insufficient access to condoms and healthcare. But epidemiologists crunching the numbers are finding that certain assumptions just donât hold up â and that conventional wisdom doesnât explain or help the AIDS epidemic in sub-Saharan Africa.