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.
HIV: Early signs and symptoms. HIV is a virus that attacks a person's immune system. It can weaken the immune system to the point where a person's body struggles to fight infections and disease. If left untreated, HIV can lead to the disease AIDS. AIDS stands for acquired immunodeficiency syndrome. AIDS is the final stage of HIV infection.