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: AIDS is not caused by HIV. DEBUNKING: This is the biggie, of course. As long ago as 1983, researchers first isolated HIV from people with AIDS. By 1985, they had developed a test showing that the overwhelming majority of people with AIDS have antibodies to HIV in their blood.
In 2010, African Americans represented 17% of teenagers and 16% of people aged 20â24 in the overall population, but accounted for 57% of new HIV infections among those aged 13â24. Young men who have sex with men (MSM), especially those of color, have the highest risk of HIV infection among young people. Among youth aged 13-24 diagnosed with HIV in 2014, 80% were gay and other MSM. Of those, 55% were black, 23% were Hispanic/Latino, and 16% were white. Adolescent females are also at risk.