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 3: 'I Donât Need to Worry â HIV/AIDS Only Infects Gay Men'. This couldn't be further from the truth. HIV is transmitted through an exchange of body fluids, specifically semen, vaginal fluids, breast milk, blood or pre-ejaculatory fluids. Most men become HIV-positive through sexual contact with other men.
Human immunodeficiency virus (HIV) facts. 1  HIV is the virus that causes HIV infection and the acquired immunodeficiency syndrome (AIDS). 2  Anal or vaginal sexual intercourse and illicit injectable drug use commonly transmit HIV. 3  Infected mothers may also transmit HIV to their child during pregnancy or breastfeeding.