Difussion occurs from a high concentrated region to a low concentrated region. The velocity of diffussion is proportional to the differential of concentrations. In the lung arrives blood with low levels of oxygen while the long is rich with fresh oxygen so the oxygen flows from the lung tissues to the blood.
The other tissues consume oxygen continually them they get poor in oxygen and so the oxygen that is in the blood diffuses to the tissue that is poor in oxygen.
Embarrassment, envy, anger.
The difference between tobacco and smokeless tobacco is that the smokeless tobacco is something you could chew onto and causes more risk of a heart attack then by smoking tobacco. Tobacco is also dangerous and you would call it secondhand smoking since it’s nothing chewable. And simply just smoking tobacco from 1 to 7 hours could increase a heart attack risk by 24%.
