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.
In North America, AIDS is blamed on the health effects of unprotected anal sex and poppers on homosexual men, an argument which does not account for AIDS in drug-free heterosexual women who deny participating in anal sex. In this case, HIV/AIDS denialists claim the women are having anal sex but refuse to disclose it.