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.
HIV Myth 2: 'HIV and AIDS Are the Same Thing'. Absolutely not. HIV is the virus that infects a person and attacks the immune system. AIDS is the disease that develops later in people with HIV that remain untreated or don't respond to treatment.
HIV, the virus that causes AIDS (SIDA in Spanish), is transmitted via blood, semen, vaginal fluids, and breast milk. There have been no documented cases of HIV contraction from urine, sweat, and saliva. Dont be paranoid. There is nothing to worry about.