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.
The popular explanations include extreme poverty, lack of HIV education, and insufficient access to condoms and healthcare. But epidemiologists crunching the numbers are finding that certain assumptions just donât hold up â and that conventional wisdom doesnât explain or help the AIDS epidemic in sub-Saharan Africa.