Polycythemia Vera. This slow-developing disease occurs when bone marrow produces too many red blood cells, which can lead to thickening of the blood. The condition is thought to be caused in part by a mutation in a gene called JAK2, which regulates the production of various types of blood cells, keeping them in proper balance.
Hilly landscapes and cathedrals dominate much of Andalusia, Spain. The Iberian Peninsula, predominately occupied by the European countries of Spain and Portugal, lies in southwestern Europe. With an area of 582,000 square kilometers, its is the third largest peninsula in the continent.
1 GEOGRAPHIC SETTING AND ENVIRONMENT. With Portugal, Spain makes up the Iberian Peninsula, or Iberia. Iberia is separated from the rest of Europe by the Pyrenees Mountains, which rise to a height of 11,168 feet (3,404 meters).The peninsula is bordered by the waters of the Mediterranean Sea on the east, the Strait of Gibraltar on the south, the Atlantic Ocean on the west, and the Bay of Biscay on the northwest.beria is separated from the rest of Europe by the Pyrenees Mountains, which rise to a height of 11,168 feet (3,404 meters). The peninsula is bordered by the waters of the Mediterranean Sea on the east, the Strait of Gibraltar on the south, the Atlantic Ocean on the west, and the Bay of Biscay on the northwest.