Confidence, not rates, is key for U.S. economy: Wells Fargo CEO. By Dan Freed. Still-fragile consumer confidence, rather than expected interest rate hikes, is the most important factor holding back a stronger U.S. economic recovery, Wells Fargo CEO John Stumpf said on Tuesday.
The lungs directly connect the respiratory system to the circulatory system, for in the lungs, oxygen will leave the air and enter the blood so that it can be transferred to all of the other cells in your body.he lungs directly connect the respiratory system to the circulatory system, for in the lungs, oxygen will leave the air and enter the blood so that it can be transferred to all of the other cells in your body.
Gas exchange. We need to get oxygen from the air into the blood, and we need to remove waste carbon dioxide from the blood into the air. Moving gases like this is called gas exchange. The alveoli are adapted to make gas exchange in lungs happen easily and efficiently.Here are some features of the alveoli that allow this:they give the lungs a really big surface area. they have moist, thin walls (just one cell thick). they have a lot of tiny blood vessels called capillaries.he alveoli are adapted to make gas exchange in lungs happen easily and efficiently. Here are some features of the alveoli that allow this: they give the lungs a really big surface area. they have moist, thin walls (just one cell thick). they have a lot of tiny blood vessels called capillaries.