Source:http://linkedlifedata.com/resource/umls/id/C0028405
CSP: continent occupying the northern part of the Western Hemisphere, from the Arctic Ocean to Central America, and including the nations of Canada, the United States of America, and Mexico.,NCI: North America is a continent in the western hemisphere of Earth, bordered to the west by the Pacific Ocean, the east by the Atlantic Ocean, the north by the Arctic Ocean, and connected at the south to South America by the Isthmus of Panama.