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smoking cigarettes raise blood pressure An association between habits and in normotensive Japanese men Smoking and High Blood Pressure:
Description
A big fire holds a huge reservoir of glowing, red-hot fuel, and your breath mostly just feeds it extra oxygen while barely denting its temperature

We thought maybe a bomb had gone off somewhere

Of course, any question involving the way the body works has a short answer, and a long, more nuanced answer

Time response of cytochrome P450 1A2 activity on cessation of heavy smoking
