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.
HIV stands for (human immunodeficiency virus) There are five stages of progression of HIV to AIDS to Death: Stage 1 - initial transmission and infection with HIV. Stage 2 - infection without presention of signs or symptoms (may last 10 or more years) Stage 3 - signs and symptoms of HIV begin to appear.