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.
Myth One. Myth: AIDS is mostly an African problem. Fact: Of the 42 million people around the world who live with HIV/AIDS, 70% are in sub-Saharan Africa. HIV/AIDS exists and is spreading in Africa in a socioeconomic context created by western colonialism and, more recently, western trade and economic policies.
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.