SjoegrenâsjÃ¶gren (s PRONOUNCED-showâgrin) s is a chronic autoimmune disease in which aâperson s immune system turns against and attacks theâbody s own. Cells Inâsjoegren, sjÃ¶gren s white blood cells-attack moisture, producing glands such as the tear ducts and, salivary glands making it difficult for your body to produce saliva. and tears
CEPF is no longer active in this region. Spanning most of Central America, the Mesoamerica biodiversity hotspot encompasses all subtropical and tropical ecosystems from central Mexico to the Panama Canal. This includes all of Guatemala, Belize, El Salvador, Honduras, Nicaragua and Costa Rica, as well as a third of Mexico and nearly two-thirds of Panama. The hotspot harbors the highest montane forests of Central America, with the most extensive and best-protected cloud forests.
Mesoamerica is one of only five regions of the world where writing was independently developed. In Central Mexico, the height of the Classic period saw the ascendancy of the city of Teotihuacan, which formed a military and commercial empire whose political influence stretched south into the Maya area and northward.here is extensive topographic variation in Mesoamerica, ranging from the high peaks circumscribing the Valley of Mexico and within the central Sierra Madre mountains to the low flatlands of the northern Yucatan YucatÃ¡n. peninsula