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 Hiv/Aids story is a multi-billion/dollar/pound fraud, racket which is based on two fallacies: Aids is a single disease/aids is a disease and secondly that Aids is caused by the HI virus or the HIV VIRUS as some choose to call it - perhaps they think V in HIV stands for volcano.