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.
Hunnisett said she's been fielding a lot of calls since Atamanenko's office put out the information. She said a common misconception is that Canadians regularly travelling to the U.S. for long stays can spend up to 182 days, or six months, in the U.S without being considered a resident for tax purposes.