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 3: 'I Donât Need to Worry â HIV/AIDS Only Infects Gay Men'. This couldn't be further from the truth. HIV is transmitted through an exchange of body fluids, specifically semen, vaginal fluids, breast milk, blood or pre-ejaculatory fluids. Most men become HIV-positive through sexual contact with other men.
AIDS was first reported in the United States in 1981 and has since become a major worldwide epidemic. AIDS is the most advanced stage of infection caused by HIV. The names HIV and AIDS can be confusing because both terms describe the same disease. But most people who are HIV positive do not have AIDS.