Asbestos Exposure Mesothelioma Asbestos is made up of minerals that are bonded together to form thin, fibrous substances. When these materials are disturbed tiny fibers can be breathed in. They cling to the lining of the lungs (pleura), and sometimes reach the abdomen or heart lining (peritoneum or tunica vaginalis). https://telegra.ph/The-10-Worst-Asbestos-Mesothelioma-Cancer-Errors-Of-All-Time-Could-Have-Been-Prevented-06-16