Gas exchange is the delivery of oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. It occurs in the lungs between the alveoli and a network of tiny blood vessels called capillaries, which are located in the walls of the alveoli.
Admitted for 180 days â Canadians admitted in âVisitor for Pleasureâ or B-2 status without a B-2 visa in hand are deemed to be admitted for 180 days under current US Customs and Border Protection (CBP) interpretation of the rules.
Originally Posted by evanusc. Nevertheless, if you plan to stay in Canada for a year, you will need a visa, just like the Canadians can't just go to the US and stay for a year. My guess is you can stay in Canada for a maximum of 3 month, but better try to make sure before you go. Yes they can, and anyone else can too. You just have to get here.