Andesăn´dēz [key], mountain system, more than 5,000 mi (8,000 km) long, W South America. The ranges run generally parallel to the Pacific coast and extend from Tierra del Fuego northward, across the equator, as the backbone of the entire continent. The Falkland Islands are a continuation of the Andes, and evidence shows that the system is continued in Antarctica. The Andes go through seven South American countries— Argentina, Chile, Bolivia, Peru, Ecuador, Colombia, and Venezuela.
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