Howling:The difference between Gallifreyans and Time Lords

What are the differences between Gallifreyans and Time Lords? I bring this up, as in Smith and Jones Martha asks the Doctor what species he is, to which he replies he is Time Lord. This makes it sound like Time Lords were not Gallifreyan, but a different species. --The Thirteenth Doctor 12:21, October 12, 2010 (UTC)