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.
Introduction. Changing HIV-1 virulence over the course of the AIDS epidemic carries implications for the future treatment and prevention of HIV/AIDS. Virulence is defined as the severity of a disease; for HIV, virulence is defined as the rate of progression to AIDS in untreated infections.