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.
Electron micrograph of the human immunodeficiency virus. HIV/AIDS denialists dispute the existence of HIV or its role in causing AIDS. HIV/AIDS denialism is the belief, contradicted by conclusive medical and scientific evidence, that human immunodeficiency virus (HIV) does not cause acquired immune deficiency syndrome (AIDS).