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.
Human immunodeficiency virus (HIV) facts. 1  HIV is the virus that causes HIV infection and the acquired immunodeficiency syndrome (AIDS). 2  Anal or vaginal sexual intercourse and illicit injectable drug use commonly transmit HIV. 3  Infected mothers may also transmit HIV to their child during pregnancy or breastfeeding.