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 and AIDS. 1  AIDS is an immune deficiency condition caused by infection with the Human Immunodeficiency Virus (HIV) 2  Epidemiology HIV can occur in any population. increased prevalence in hemophiliacs, IV drug abusers, and homosexual men. 3  Pathophysiology the CD4 cells (T-helper cells) are affected.