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.
Racism an underlying cause of HIV epidemic, says Charlize Theron. Racism is one of the underlying causes of the HIV epidemic and one of the reasons why it has not yet been brought to an end, according to actor and Aids campaigner Charlize Theron, who says that people are afraid to talk about it.