coelom. coelom (sÄËlÉm) [ key ], fluid-filled body cavity, found in animals, which is lined by cells derived from mesoderm tissue in the embryo, and which provides for free, lubricated motion of the viscera.oelom. coelom (sÄËlÉm) [ key ], fluid-filled body cavity, found in animals, which is lined by cells derived from mesoderm tissue in the embryo, and which provides for free, lubricated motion of the viscera.
Facts You Should Know. ALS is not contagious. Although the life expectancy of a person with ALS averages about two to five years from the time of diagnosis, this disease is variable, and many people can live with the disease for five years and more. More than half of all people with ALS live more than three years after diagnosis.
About 5,600 people are diagnosed with the disease in the U.S. each year, and between 20,000 and 30,000 people live with it at any one time [source: ALSA]. What exactly causes ALS isnât known, but researchers are learning more about the disease all the time.