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 / AIDS. HIV is the acronym for the Human Immunodeficiency Virus, a virus that attacks the bodyâs immune system, leading to full-blown AIDS (Acquired Immunodeficiency Syndrome). AIDS is devastating because it leaves the body susceptible to life-threatening infections and certain kinds of cancers.